Showing posts with label approaches. Show all posts
Showing posts with label approaches. Show all posts

Sunday, October 16, 2016

Someone Has to Read Them

The flight that was cancelled in the previous blog entry is back on again, but there's a new weather puzzle to solve. The scud is still present in the low terrain, but this time the air is stable, only trace icing expected. The clouds only go up to ten thousand, so I can climb through them and fly on top with no fancy routing. We'll cancel IFR and alerting after we get into uncontrolled airspace further north, so we can descend out of radio contact and look at the things that it's our job to look at, without people getting all antsy about us showing up to do an approach at our destination.

This time we do depart, and the flight goes as planned. The wings and windshield stay clean as we climb through the slowly brightening grey. I switch to sunglasses as we break through the top into the sunshine. I'm going northwest, and the sun has risen behind me, projecting a round rainbow on the clouds below me, visible through the propeller. It's called a glory or the glory of the pilot because you have to be between the sun and the clouds to see it. The colours repeat through the ring, faintly right into the centre and fading away to the outside. It's a light refraction effect, obviously, but according to the Wikipedia article it isn't certain how they are formed.

As we continue north, dark shadowy holes appear in the solid deck of clouds below, and then they widen to become green and grey and sparkling as the clouds scatter out and we can see the rocks and lakes and trees that define most of Canadian geography. the lakes are not yet frozen and some of the deciduous trees still have their coloured leaves. The clouds thin to occasional wisps and I cancel IFR to fly without having to follow a clearance or stay so far above terrain. Once we finish our work we turn again toward our destination. I'm listening to the Centre frequency as well as the air-to-air en route frequency of 126.7. I can't communicate with Centre, but I can hear other aircraft talking to them and pick up some information that way. A Dash-8 announces that they are in the missed approach from what we'll have to call Elk Creek. The fact that Elk Creek is below minima is a bad sign for the weather at my destination, because the two airports are relatively close, but then the Dash-8 pilot reads back a clearance to my destination. That's a good sign that overrides the bad one. He wouldn't miss and then go somewhere dubious. Sure enough I soon hear the Dash-8 pilot say he's planning the contact approach, which means he has the terrain in sight and is confident he'll remain visual all the way to the runway. He asks to fly direct a fix I'll call WIBEL and then I start to be able to hear the controller, who can't find WIBEL, even after the pilot spells it. The pilot tells him which approach it's on, and that it's the fix before AXFUG. (I wonder who makes these things up. It's kind of fun.) The controller says that the fix before AXFUG is WAGPO. I know what the problem is, but I can't interrupt their conversation. The two of them discuss this for a while, get the pilot an appropriate clearance, and then the controller has a number of calls to catch up on. When he's done I check in and add, "There's a NOTAM out today on the WIBEL/WAGPO situation." I knew I was planning in here VFR, but my eye ran over a NOTAM mentioning a waypoint substitution, and them repeating the waypoint name has triggered my recall.

The controller says, "Thanks, Aviatrix," using my real name over the frequency. He finds the NOTAM and reads it out. WAGPO has been temporarily replaced by WIBEL. It's curious that the airliner had a database that showed the new temporary waypoint while the controller didn't. I would have expected it to be the other way around, or to have them both be operating with post-its on their screens.

Tuesday, September 22, 2015

I See Fourteen Lights

There might be fog or mist present when I depart tomorrow from an uncontrolled aerodrome. The minimum allowable visibility for my departure is half a statute mile, so I need to be able to determine how far I can see along the runway, without a tower, a flight service specialist or an electronic runway visual range (RVR) measurement. I'll have to count runway lights.

I haven't done this in a while--you don't get fog much in the summer--so I had to double check some numbers. I found then in A Quick Reference: Airfield Standards from the US FAA. (Nice little reference. I intend to read it through in its entirety sometime, maybe while waiting for fog). It confirms for me that the lights along the runway edge are spaced 200' apart. There are six thousand feet in a nautical mile, but for some reason ground visibility is measured in statute miles, which contain only 5280 feet apiece. (I had to look that number up, too). That means that I need to be able to see half of that, or 2640' feet along the runway to meet the half-mile minimum visibility. And at this point I realize "well duh: if there is an RVR then a half mile is RVR 2600." So I'm on track. This means that if I pull onto the runway even with one set of runway lights (they are aligned with each other on each edge of the runway) I need to be able to count 2600 divided by 200, or thirteen more pairs of them, stretching away into the foggy gloom, in order to be legal. I'm happy to ignore the extra 40' because RVR values do, and because I'm looking along the hypotenuse of the triangle whose base is on the runway edge, and surely I'll pick up another forty feet there.

Whom am I kidding? This is Cockpit Conversation. We don't make assumptions about trigonometry here, we do trigonometry. The base of the triangle runs from my position at the first runway edge light, to the fourteenth runway light, and is 2600' long. Assume I'm in the middle of a runway, standard width 200', making the height of the triangle 100'. The measurement of the hypotenuse is therefore sqrt((2600 x 2600)+(100 x 100)) = 2602. So no, actually, there is almost no difference between the distance from the first runway light to the fourteenth, and the distance from my eye to the fourteenth light. That's a very skinny triangle. My assumption is wrong. So if I wanted to be a nerd, I could park thirty-eight feet back from the first pair of runway lights. But generally I want to go flying.

In order to save Americans time telling me that the RVR for half a mile is 2400, I'll confirm that in Canada and the other countries I checked researching this post, the RVR for half a mile is 2600. I don't know why Americans use 2400, and neither do the people in this thread on the subject. I especially like the way that the person who initially answers the question there doesn't notice that RVR 2400 for a half mile doesn't add up, until the student points it out. Another thing I expect American commenters to want to tell me today is that "if you have to count runway lights on short final, you should go missed." That's becase their landings are legally restricted by visibility. But Canadian landings are governed only by decision height or MDA. If the runway is visible at DH/MDA, a landing is authorized for us. Our plates have an "advisory visibility" which we can use to calculate whether we expect to be visual at minimums, but its value does not affect our legality to put the airplane on the runway. Once we are past the FAF, the RVR does not restrict us. We do have something called an approach ban which can stop us from legally attempting an approach in terrible visibility, but that's a whole 'nother topic.

Tuesday, December 16, 2014

Out of My Nose

Six hours ago I was woken for work. Five hours ago I arrived at the airport. Four and a half hours ago I had completed a preflight inspection, towed an airplane out of the hangar, and was supervising fuelling. Three and a half hours ago I knew the weather forecasts everywhere in our purview, and was out of Candy Crush lives and unread Facebook entries. Forty-five minutes ago I was told I would be released from duty in thirty minutes. Half an hour ago I called friends to say I could be at their place in forty-five minutes. Twenty minutes ago I was given a destination to fly to. Nineteen minutes ago I filed an IFR flight plan according to the CFS-listed Preferred Routes, and cancelled with the friends. Thirteen minutes ago I started the engines. One minute ago I was at the hold-short line waiting for departure clearance. "Traffic ahead is in the circuit; turn right ten degrees as soon as safely able so as not to run him over; contact departure airborne; cleared take off." Now I'm airborne.

My clearance was to follow the filed route. I'm coming up on the waypoint at the end of the published departure from the airport. The plate says "expect radar vectors to assigned route" and sure enough the departure controller assigns me a heading. It's a left turn of about twenty-five degrees, keeping me clear of some traffic, I presume. He approves a climb right to en route altitude. I put the ice protection on before entering cloud, but the forecast was correct, and I picked up no ice at all. After about ten minutes, I'm cleared direct my next filed waypoint, to continue on the flight planned route. I come up through the cloud layers into the sun.

For two hours I fly on top of the clouds, enjoying brilliant bright sunshine. Clouds look so much nicer from the top. At top of descent the icing protection goes back on and I start down. Oxygen valve off below ten thousand, but I still have the nasal cannula on my face, because it's tangled up with my headset and I'm busy with charts and checklists and engine controls. The controller clears me to an altitude that is just above the clouds. We skim along, almost touching them. It's the only way you can see how fast an airplane goes, to be that close to clouds whipping by. I take off the cannula and set it aside. Ahh, nose freedom. I'm told to expect direct to the initial fix for the destination approach in five minutes, and I'm starting to slow down to configure for that. The airplane has microswitches in the throttles: retard either one below a certain point before the gear is locked down, and it will set off an alarm. The point at which the microswitch is tripped is a constant amount of throttle travel, but it's not marked on the throttle quadrant--and I don't look at the throttle quadrant markings while adjusting power anyway. I'm looking at the manifold pressure. The manifold pressure reading at which the gear horn will sound varies by an inch or so (I originally wrote "150 rpm or so" which is too confusing to leave, but too funny to just delete). I guess it depends on temperature and air pressure and who tuned the engine last. I sometimes want the power that low before I want to put the gear down, so I warn my crew that the alarm may sound. I do this today, and he replies with a question, "Why would that make the stall horn sound?"

I realize I have inadvertently said "stall horn" instead of "gear horn." I accept the correction and explain, "The wrong word came out of my nose."

At the end of the flight I admitted that I hadn't intended to say "nose" there either. Apparently my brain was busy processing altitude calculations and thought "nose" was close enough to the word I had asked for.

Friday, November 07, 2014

Geo Referencing

You have at some point probably seen a movie or a television show, usually for children, that uses a gimmick where a story in a book comes to life, or morph into the action of the show. Usually the pages of a book are shown on screen, with text introducing the story, and then a picture. The picture becomes live action, or perhaps the pictures move around in the text. In a movie it's a sufficiently common device that you know if it starts that way, the movie will end back on the printed page with the ornate words The End. But imagine if you were reading a regular, real book. A familiar reference book whose fonts, diagrams, and footnote style have so long been part of your life that you know exactly what to expect of it. Now imagine that a picture or diagram in that book, the one you are holding in your hand, comes to life and starts explaining itself. That's how my introduction to approach plate Geo Referencing went.

An approach plate is a diagram showing an airport runway and the procedures, points and aids associated with navigating an airplane to a point in space from which a safe landing can be performed. If shows the plan view and the side view, with symbols showing where and how to turn, minimum altitudes for each sector and part of the approach, distances, magnetic variation, and type of lighting. It tells you the frequencies for ATC, how much to add to your minimum altitude if using a remote altimeter setting, and has an effective date. The Canada Air Pilot for each region, the physical book in which these things are published is reprinted with changes every 56 days. Most plates don't change from one revision cycle to the next, but the whole CAP is reprinted. When the new one comes you strip the coil bindings off the old one and toss the pages into the recycling. You can tell there's no change if the new plate has the same effective date, worth looking at in case you have inadvertently memorized some data that has changed.

With the Fore Flight electronic flight bag, these approach plates are replicated on the iPad. Instead of paging through the coil-bound CAP trying to guess whether a particular airport will be alphabetized under its own name, or considered a sub-plate of the larger nearby airport, you hold your finger on an airport displayed on the iPad chart until a box comes up, showing all the airports that your stubby finger could reasonably have been aiming at. Tap More next to the one you wanted, then Details then scroll down to Procedures and you can tap Approach and select the approach plate you want. I haven't done a timed test from pulling the iPad or CAP out of the map box, to looking at the desired plate, but I think the iPad is faster. The paper one is easier to read in bright light conditions, even with the iPad turned up full, but in dim light the self-illuminating iPad is great, until it is pitch black dark, at which point it becomes too bright, even if you follow the instructions and turn the brightness to minimum in settings before dimming within the app.

Either way I get the familiar approach plate, very carefully replicated. It's possible to zoom into the iPad ones to read little numbers, easier than pulling out a magnifying glass, but you have to be careful not to leave it zoomed in, when that moment comes on the approach where you glance back at the plate to confirm the minimum descent altitude, and the data isn't on the screen because you zoomed in to see if that waypoint was spelled with an F or a B. A hundred feet above MDA is not a good place to have to pinch or scroll a screen.

The first time I used the iPad for an approach, I had the conventional paper chart and the iPad both out, and it was VMC. I briefed the approach, flew direct the cleared fix and then eeep! the approach plate came to life. A symbolic airplane representing my position appeared on the screen in the position where I actually was. Even though I have used moving maps for years, the appearance of a moving you-are-here dot, Fore Flight calls it "ownship position" on the plate was freaky exciting magic. Ten years from now pilots will stare at old approach plates in puzzlement, unable to situate themselves mentally. This is a huge benefit for situational awareness. It even switches automatically to the taxi diagram and shows me where I am on the airport after landing.

I learned that this was called Geo Referencing a couple of days ago, from an error message. The app told me that Geo Referencing was not available because the plates were not current. What? These are valid until November 13th. (And the error message came up in October). I think American charts are on a 28-day cycle, so the app auto-expired Canadian stuff after that time period. I brought the iPad into the hotel to try and update them. It's just downloading the same set again, I'm sure, but this is hotel internet. It hasn't worked in all the time I've spent writing this blog entry. Why did it not update everything before I left when I selected "pack" for the flight out here? There are a number of things that Fore Flight doesn't get quite right for Canada, and I haven't found a bulletin board or user forum where these things are discussed, to determine for sure whether it is the product and not me who is missing something. I now know that the iPad has to be updated at the same time as I update the GPS database (which comes from the US, on a 28-day cycle).

Sunday, October 19, 2014

Peer Pressure

As I fly from one airport to another I speak to numerous air traffic controllers. Let's say I depart Grande Prairie (I think they're almost finished the runway upgrade) for Calgary. I would call Grand Prairie Radio, who would ask me to monitor the clearance delivery frequency. Once I had the clearance I would go back to radio, until after take off, when I would switch to Edmonton Centre. They clear me to my cruise altitude and on course heading, and then might switch me to Edmonton Centre on a different frequency to continue monitoring my flight. As I approach Calgary they will switch me to Calgary Arrivals (which is probably the same frequency as Calgary Departures), who will give me an approach clearance. If there are numerous approaches available at an airport, they may ask me which I prefer. If not, they'll just assign me the usable one. If the weather conditions are fine and I can see the airport, the approach may be "visual" -- no fancy electronics required, just fly to the runway. They can assign me the visual, or I can ask for it, but if I don't feel comfortable with the visual, or just want to practise my skills, I can ask for an instrument approach.

On this occasion I've just switched to the arrivals frequency and I hear the controller telling a pilot, "Everyone is doing visuals, but if that's what you really want to do, you can plan it." That pilot had obviously just asked for an instrument approach.

The pilot responds, "Okay, we'll do the visual."

We did the visual, too, as fast as we could and still get the gear down, because that's what tower (the frequency approach handed me off to) asked for.

Friday, October 10, 2014

I Would Have Gone With Stephen Hawking

Before making an approach to an airport, every pilot wants to know the wind strength and direction, what clouds they will encounter, the altimeter setting, and what runway is in use. At some airports the pilot figures out this information herself by flying over the field. At others a flight service specialist simply recites the information to each arriving pilot. At busy airports, a recorded message called ATIS recites the information on a dedicated frequency. The information on the ATIS is typically updated once an hour, or when conditions change. At some airports a controller just reads the information into a recording machine, so you can hear his or her voice, fast or slow, annoyed or cheerful, with occasional minor stumbles and the tower background noise. At others an automated voice reads the ATIS.

Here's a live human reading the ATIS:

Here's the ATIS read by the English-language automated voice Nav Canada uses (in Montréal, the Frech ATIS is on a different frequency):

Today I've just picked up an ATIS that uses an automated voice, and my non-pilot co-worker says, "I like him. He reminds me of David Suzuki." It's pretty obvious that "he" is a robot, and I've never thought of David Suzuki as sounding robotic. For foreigners not familiar with Suzuki, here's a clip. (I ask you to please refrain from commenting here on Malthusian economics, environmental sustainability or Suzuki as a person. The clip is there just so you can hear his voice).

I don't hear the resemblance, except perhaps that he has the earnest careful way of speaking, slowing down to make points. But not more so than any other public speaker. It made me realize, though, that I always assumed the robot was a white guy. I'll try and picture him as different ethnicities now, and wearing different funny hats and ties.

Here's a British automated ATIS voice, not as frightfully British as I was expecting.

Monday, July 28, 2014

Dead Reckoning

As usual I have flight-planned for one task and the onboard satellite communications link to base brings us instructions to do something else. We're to fly direct to a particular airport, and get a maintenance extension from an approved maintenance organization there. We can do that. I punch it in on the GPS, O Mighty Box that guides us safely from place to place.

The GPS in this particular airplane is not that mighty. It's a nice colour moving map, WAAS capable IFR installation, but it has a habit of losing GPS position for exactly two minutes at a time, about twice a day.  We don't fly GPS approaches in this airplane. The database isn't up-to-date and it has a great ADF and VOR.

It's almost nice to have the one or twice a day reminder to keep my navigation skills honed.  DEAD RECKONING says the screen, continuing to show the little airplane symbol, assuming that we're continuing on the same track and speed.  People say that it used to be deduced reckoning, reduced to ded. reckoning, and then converted to dead. I don't know if that's a reverse etymology or not, but some people get quite stuffy about spelling it DED. Garmin does not agree. And two minutes later, almost to the second, it knows where it is again. It isn't a satellite configuration issue. It hasn't lost power. I haven't banked excessively, blocking the GPS antenna. it just does it. We track the issue for a while, trying to troubleshoot but never find its periodic outages corresponding to time of day, time in operation, position, anything.

Eventually when the plane was down for maintenance long enough for this to happen, we pulled the entire unit and sent it in for repair. Like all electronic devices these days "repair" consisted of us receiving a reconditioned model of the same type. It hasn't lost GPS position since, and we bought a database subscription for it, so now I trust it with my life. Or at least with my acute embarrassment.

Tuesday, June 10, 2014

Ups and Downs

Pilot Proficiency Check. Flight test time. The examiner is a check pilot from another company. The ride is scheduled for Friday. I make sure all the right exams have been written and recurrent training signed off.  The examiner calls on Thursday. "Let's do it today. The weather will be better than tomorrow." Why stress for another day when I don't have to?

The examiner doesn't enjoy sitting in an airplane watching people stress out. He just wants this over. After one turn in the hold my inbound leg is too short and I never really intercepted the inbound track completely. That's not abnormal for the first time around on a parallel entry. He asks me how I will correct for the wind, and when I tell him how long I will fly outbound for and on what heading, to try to make the next inbound a neat one minute line along the appropriate radial, he is satisfied and calls for the NDB approach.

I tell him I will fly two minutes outbound from the beacon before turning inbound, but he gets bored watching the scenery go by and tells me to turn in early. This puts me high on the approach. I know that is the main hazard of this step down approach, not being able to make the step down altitudes. It's why I chose the two minute outbound. Now I'm fighting to get down and not overspeed my flaps and gear. I don't make the MDA by the missed approach point. I'm too high to land. It wasn't a trick on his part, he was just impatient. He sees what he did, and says he won't fail me. Still I should have refused the early turn. I know my airplane. I'll take the low score there.

When I get the ride report back I grimace again that it's only good for a year. An instrument rating only has to be renewed every two years, and not too long ago PPCs were good for the same length of time, but they've now shortened it to one year. The first time that happened I called the examiner up to tell him he's made an error on the paperwork. But there's a good thing, too. He didn't even give me a 2, the lowest passing grade on that approach. It's a three, the "minor errors" rating. I don't know if he forgot, or felt badly for asking me to turn early. At any rate I'm licensed to commit aviation in this aircraft for another year.

Tuesday, May 27, 2014

Top Gun Hair

My hair is growing wildly in every direction. I've been working every day for almost as many days in a row as the law and company op specs allow, and the few days off that have materialized haven't aligned with the days my hairdresser is available. (Yes, I could go to another hairdresser. Indeed it was just such a crazy hair situation that caused me to find my current hairdresser, but I don't take cheating on my hairdresser lightly).  The days off have been occupied with laundry and what I call 'weeding.'

'Weeding' for me is pulling out handfuls of green things I don't know what they are so that I can see the colourful flowers that I don't know what they are either.  My favourite part is when the weeds attack one another, e.g. when a climbing vine weed binds itself around a fast-growing vertical weed. My garden is even more unkempt than my hair. I confessed to a neighbour that I really didn't know where to start on the weeding and she said a little contemptuously, "You could at least start." Her yard is enough houses away that I don't think my weeds actually attack hers, so I hope she derives satisfied pleasure that her garden is so much nicer than mine. It's good when one's garden brings others pleasure, don't you think?

I was scheduled to do a PPC ride (annual recurrent flight test) a couple of months ago, but the examiner got sick and missed his ride, so he wasn't qualified to do mine on the appropriate day. It's stressy getting ready for a PPC, because I have to demonstrate flying the airplane in a way I almost never fly it.  I don't even know what approach category I should put myself in. (Approach categories are based on approach speed in Canada, not on stall speed. I can comfortably approach at anything between max gear extension speed and blue line, a range of forty knots, spanning three categories. And in visual conditions I have accepted requests to maintain speeds outside that range at both ends. Sequenced with military jets for a long runway I can keep my speed above gear speed until short final, and then let it bleed off over the runway before dropping  gear and flaps. And sequenced with little training aircraft in a busy circuit I have turned final a few knots below blue line, still going about double the speed of the student in front of me.


Blue line is the best rate of climb speed on one engine, a speed I should be at or above while climbing, so I don't need to try and accelerate to it if I lose an engine. It's still faster than red line, the minimum controllable airspeed or Vmc. That's the speed below which the asymmetrical thrust resulting from an engine failure may render the airplane uncontrollable. Vmc is calculated at full power, so while being below blue line on final represents a low energy situation, it's not one that would flip me upside-down if an engine failed. Should I need to abort the landing and go around because the student in the Cessna didn't make it off the runway in time, I would be sure to increase speed above blue line before raising the nose for the climb.

It's at take off, during a full power go around, or in very low speed practice manoeuvres that Vmc becomes of most concern. The POH advises that at take off the airplane should be kept near the runway until Vmc. Given that the rotation speed specified in the POH is Vmc, except for a different place in the POH where it's given at Vmc+5, I think I can keep the airplane near the runway until after rotation. For approach it recommends only "Maintain sufficient speed during turns in the traffic pattern." Yeah, thanks. I got that. It's a good thing you told me, POH.

So I'm in the office, looking for more specific training materials and someone eyes the baseball cap under which I've crammed all my unruly hair, crying out for the attention of a competent hairdresser. "Is your hair a different colour under there?" he asks. I explain that I'm pretending to be like Kelly McGillis in Top Gun. He is unfamiliar with the reference. "Who is Kelly McGillis?" What is he doing in aviation?

I elaborate, "I'm imagining that if I take my hat off, my hair will cascade out, looking perfect." Everyone has seen that scene in some movie or another. And then I remember that in the scene where Kelly is wearing the baseball cap, she doesn't take it off. She's wearing the cap because that scene was filmed later, after she had already changed her hair colour for another movie she was in. My coworker was right all along. What am I doing in aviation? I'd better re-watch the movie. Surely there is some scene in which she takes off a hat? A motorcycle helmet?  No, I think they don't ride motorcycle helmets in that movie. They're too cool.

Later I overhear a snippet of conversation between an HR person and an office person about maintaining a professional appearance. Hmm, maybe I need a classier baseball cap. Or a day off. Coming soon! Right after my PPC I think.

Monday, April 28, 2014

Getting My GPS Fix

As I searched my bookshelves for a book I needed to prepare for my PPC, I realized that I have been incredibly remiss in not devoting a blog entry to my favourite GPS book, Max Trescott's GPS and WAAS Instrument Flying Handbook. It is dog-eared and filled with notes on the multiple ideas for future blog entries it inspired. Max There are two reasons this entry never has never been written. One is that I had this crazy idea that I was going to be able to fully digest all the information in this book, and then write the mother of all blog entries on GPS, and the second reason is that when I pick it up it's usually because I have to learn something, and get carried away with that.

Today is one of the latter occasions, and I've given myself a time deadline to study this, so I'm just going to transcribe some of the marginal notes I made reading through the opening chapters. "Excellent and now obvious," "Max knows what he is talking about, doesn't just parrot, which explains why I am not understanding things I didn't before." "Explains from zero knowledge without insulting intelligence."

There's lots of information on GPS on the Internet, but my time is worth something in sifting the wheat from the chaff. The Internet seems to be at odds over whether the unit can be programmed to fly a hold. Given that none of the Internet people I saw say it could be done gave useful step-by-step directions on how to do it, I was believing the naysayers, but Max says, "The Garmin GNS 430W and 530W send commands that let an autopilot automatically fly a procedure turn or a course reversal in a holding pattern. On the moving map page, it adjusts the size and shape of holding patterns based on an aircraft's speed and the winds aloft. Once established in a hold, it can command the autopilot to fly the holding pattern as long as you'd like." And now I see that the unit will only do this for published holds. Max does give some tips, some credited to a colleague, Doug Stewart, on flying unpublished holds. I'll reproduce them here to enhance my understanding and remembering.

The typical hold clearance (a "hold" is the way an air traffic control asks a pilot in an aircraft that requires speed in order to stay aloft to "go wait over there for a bit") instructs the pilot to fly directly from her present position to a specified point (called a "fix"). The fix can be any defined point in space, like "thirteen miles from the ABC VOR on a bearing of 298 degrees" but usually it's a VOR or an NDB. The clearance then includes a vague direction (north, east, southwest) from the fix to hold and an exact track on which to be inbound to the fix each time she circles around. The goal is to fly a little racetrack pattern, with each inbound leg taking exactly one minute and being right on the specified track. The outbound leg isn't necessarily parallel or one minute, because winds mess us up. What also messes me up is trying to learn a procedure I use once a year when I renew my qualifications. But if I master this I can probably also use it to fly shuttle climbs and descents, which I do use in real life.

So here is what I should do: Once assigned the holding fix I set the course direct to it, with the autopilot in NAV mode to track to it. Once the autopilot has figured out the heading that will hold me on that course, I should bug that heading and fly in HDG mode on the autopilot, while I set up the hold. I hit direct to again on the autopilot and enter the inbound course as the desired track. That makes it show a pink line to the fix along that track. I should put it in OBS mode so it doesn't automatically go on to the next waypoint. Reaching the fix, I turn the heading bug to my calculated outbound heading. When I have flown outbound for the necessary time I should use the heading bug to turn inbound, but when I am within 45 degrees of the desired inbound track, I turn the autopilot back to NAV and it will intercept and track inbound. In a direct entry, I can use the ETE feature of the GPS to figure out my timing, by looking at the distance when it hits one minute, and I can look at the wind correction to figure out my outbound correction angle. Curiously he suggests triple the inbound correction, while I use double.

I see Max Trescott also sells a CD ROM course for $100. Given that that's the cost of about twenty minutes of dual instruction in a light twin, I suspect it would be worth one's while.

Wednesday, September 04, 2013

Finding Things in the Dark

I'm on another VFR night flight, but there's no fog this time and lots of bright lights around for most of the flight. I'm on the destination arrival frequency for a while before I descend to land. I hear there's a last minute rush of traffic at twenty to midnight, and then peace on the frequency. There's probably a curfew for jets here. I know I'm allowed to land here twenty-four hours a day.

Eventually approach transfers me to tower. The final approach here will be over darkness, no houses or roads, so I'm briefing myself on precautions against black hole effect, but that doesn't turn out to be my problem. While I'm on right downwind, tower asks me to keep my base in close. That means I won't have as long a final to get set up, but I can descend more rapidly than usual to meet ATC needs, so I turn base at a distance out that is safe for me and still keeping it in close. As I drop the right wing into the turn to base leg I lose sight of the runway lights. There's cloud between me and the runway. I try to get my bearings by looking further around, spotting clues beyond the perimeter of the airport to help me align, but I really need to see this runway in order to descend for it, and to turn final in the right place. I can see the constellation Orion above me out the left, as clearly as if it were outlined with little arrows in a planetarium, but the constellation defined by two parallel lines of lights about a mile away eludes me.

I confess to tower about not having the runway in sight anymore and am given vectors, plus clearance to land long. The vector brings me out where I can see the runway lights and I plummet onto the welcoming strip of three parallel bright lines. My approach briefing to myself didn't include the fact that this runway has centreline lighting, not that I would have found it any more easily had I been looking for three parallel lines instead of two. Someone is cleared into position behind me as I roll out, my nosewheel juddering slightly as it rolls over the inset centreline lights. They're ever so slightly off centre, but so am I. I think the other crew silent apologies for their delay, and they probably laugh at the ditzy aviatrix who can't find a runway on a fine night. I probably snuck behind the only cloud in the sky.

Tuesday, August 27, 2013

Fog Roulette

I'm going to conduct a primarily VFR flight with a destination that is forecast to be IFR at time of landing. It's also a destination that has flow control, so I file a "Z" composite flight plan, meaning VFR then IFR, so I essentially have my name on the list for the IFR arrival. The IFR planners don't like something about my plan, so they call me back and ask about it. I explain in more detail what I want to do, and then they tell me what I have to file in order to get that. It's less like what I want to do, but if that's what they want, then I'll file that.

We fly. It's night. It's pretty quiet. In flight I get periodic updates on weather at destination. The airport has an ILS, which puts my minima at 200' and 1/2 mile visibility. It's now 500' overcast and three miles, which will be a nice exercise in doing everything right ending in a comfortable margin below the clouds to transition to landing. And then it's 300' overcast and 3/4 mile. That's still something that anyone who is instrument qualified should be able to do, but leaves much less room for error. And then the next report is 500' overcast and half a mile. I recheck the weather and forecast at my alternate. Still good. My alternate is closer, but I'll try the big airport at minimum advisory visibility. I'm going slower than the big jets, so I'll have more time in that last 300' of descent to distinguish the runway lights through the mist. And if I miss I miss, another good exercise, and head to my alternate.

I'm ready to check in with the approach controller but Centre tells me that they are not permitting Cat I aircraft to attempt approaches at my destination. That means that since I don't have autoland or other special equipment and training to land in lower than half a mile visibility, they aren't even going to let me try. I feel, well for my initial notes on this flight I wrote "blue balls." I'm all set up and mentally prepared for the ILS and then told I can't play. But I understand. They are trying to get heavies on the ground there, have to increase their usual separation and they don't want a light aircraft tying up the facility and then going missed and making them have to hold the heavies out of my way.

I tell Centre I'll land at my alternate. Their ATIS notes they have a fog bank encroaching from the south. Oh, fun. They are still VFR. They have me keep my speed up because there's a fast jet behind me, but I get all the right bits sticking out at the last minute and put it down. Exit, taxi cautiously in dropping visibility. I advise the ground controller that this was a diversion, here overnight but don't know where to park. We were thinking of waiting it out here for a bit and then trying the big airport in the wee hours of the morning, when either the weather might have improved or they weren't so busy, but by the time I've parked in what the ground controller assures me is a good spot I really have to take his word for it, as it's 1/4 mile in fog and 200' here. We call it a night and take a long cab ride to the destination. Where the weather is now four miles and 800'. Argh. I was going to say you can't win with fog, but when you get the airplane on the ground, it's a win.

Thursday, August 15, 2013

Standard Approach Profile

To land a tricycle gear airplane on a runway is not very difficult. You just place it in the correct slightly nose up attitude and keep it straight while the main gear settle onto the runway, and then you gently lower the nose. The difficult part is to arrive at the beginning of the runway at a speed such that when you raise the nose the appropriate amount the airplane neither stalls abruptly nor balloons into the air, and to arrive there at an altitude such that the airplane contacts it at just the same moment the wings stop flying. Also the airplane needs to be configured for landing. At minimum, landing configuration should include wheels.

My airplane has a maximum speed at which I can extend the landing gear and three different maximum speeds for extension of different amounts of flaps. In a normal landing I should have the gear and all the flaps down, the final stage of flaps coming perhaps a couple of hundred feet above the runway. In order to have the speed required for that, I aim to be at the speed for the second stage of flaps by 1000' above touchdown, and that's also a good point for me to have the gear down. In order to reach gear speed it helps to have the first stage of flaps extended, usually five miles out, or mid downwind. Until then I can fly any speed I want, so long as I stay below 200 kts in the control zone, or slower if the control zone has its own speed limit. Plus I need to be out of the yellow arc if there is a risk of turbulence. Let's call that by 10,000'. And so on, continuing to work backwards until I'm leaving FL190 and deciding whether to push the nose down for a drag-increasing 2000' fpm descent or leave it gently trimmed for a 400 fpm let down. You learn in initial flight training about the relationship between airspeed and drag: the latter increases with the square of the former, so if I want to arrive at a point in space with less energy, both gravitational potential (i.e. altitude) and kinetic (i.e. airspeed) I need to push my nose down and go faster.

I'm landing today at a larger international airport, but they only have one of their runways open: construction, FOD cleanup or something, so everyone including me is heading for the same runway. I'm asked to maintain 160 knots. Not a problem on the descent, but as I get closer I want to bring the power back on my engines to cool them gradually and I ask the controller if he still needs the speed. He most emphatically does. I have to increase power to hold it. And I'm also above my maximum gear and flap extension speeds.

Remember that the aircraft is designed to fly efficiently through the air. Even if I slam the throttles to idle, which I'm not going to do, because I have to depend on these cylinders not cracking from shock cooling, the airplane will take time and space to slow down. Getting flaps and gear down adds drag, but I have to slow down to be allowed to do that. I'm finally permitted to slow down, so I pull the nose up to slow down until I have approach flap speed. This makes me climb, but they don't mind that. As soon as I add approach flaps that increases drag, and increases the amount of nose down that gives me the same speed, so I can put the nose down while still slowing down and as soon as I have gear down goes the gear, still slowing so I can add more flaps, put the props ahead and on the runway nice and slow, so I can exit at the first available taxiway.

Phew, not how the flight instructor taught it, but still using what I learned (and taught) back in flight school.

Sunday, August 04, 2013

A Story In Radio Calls

A light has illuminated to tell me that my landing gear is safely stowed in the wings and nose, and the gear handle has returned to neutral. Climb power is set and the airplane is trimmed for about ten knots above best rate of climb speed, a speed approved by the manufacturer and one that experience has taught me will get me to my altitude and destination in an expeditious manner without any of the little temperature and pressure needles hitting their yellow or red extremes. I have made the slight left turn which I advised the local radio operator I would make, and according to the little green circle depicted on the GPS, I am clearing their zone. I press the button on the radio that swaps the active and standby frequencies so that I'm now listening on the Centre frequency, as I confirmed I would when I read back my IFR clearance before departure. I listen before speaking, because on the radio just as in real life, it's poor form to interrupt a conversation or speak at the same time as others.

The controller is advising a pilot of conditions somewhere, by telling him that a particular carrier "got in". That means the weather is poor there, near the minimum required for a safe approach and landing and that there was some doubt as to whether he would or not. It's good where we are, and where we're going. I call up with my current and cleared altitude and get the rest of my clearance. A few thousand feet later I'm asked to squawk ident and say altitude, so I push the IDENT button and tell him the altitude I am now climbing through, and he tells me I am now radar identified. For a while, anyway. Two and a half hours later I'm no longer on radar and I'm asked to state my position and direction of flight. I think the controller actually said, "GPS position," knowing we all have these magic boxes. I twist the middle knob all the way to the last nav page and read it off, rounding to the nearest minute of latitude and longitude. I don't even like to think what a pain that would have been to do the old fashioned way, with charts.

My position must not have been an issue because an airliner is cleared to descend for an approach. The pilot says he will be on the ILS but will be flying the missed approach for the corresponding RNAV approach because the ILS missed is not in his database. That sounds lame, but I know from the NOTAMs that the missed approach has recently been modified, so it's plausible that the onboard database doesn't reflect that and that the pilots aren't allowed to fly procedures that aren't in the database. It's professional to figure out what issues you're going to have with an approach before you're actually experiencing them. The controller accepts the pilot's suggestion and clears him to fly it "in the event of a missed approach."

A few minutes later the pilot is back. They missed. That is, they followed the instrument landing instructions, flew as low as the procedure would allow them, but didn't see the runway, so followed the RNAV instructions for what to do in this case. They ask for a hold, suggesting that it be at a particular NDB, inbound on the 185 track. The controller doesn't understand at first, probably because he isn't in an airplane thousands of feet above and with a straight line to the one that is asking. The pilot repeats the request and the controller clears him to do it, so the pilot repeats back the clearance, the one he asked for in the first place. The 185 track to the NDB is probably a direct entry to the hold for him, so he can cross the beacon and turn outbound to 005 right away, but I automatically look at my heading indicator to see how I would enter that hold were I direct the beacon on my current track. It's in the parallel sector for me, so I would turn left to 005, left direct the beacon, and then right outbound to 005, so I could turn right and track 185 inbound.

The airliner enters the hold. The centre controller checks on them from time to time, asking if they want weather. Nope, they're fine, they are monitoring a continually updating AWOS recording which tells them the visibility and ceiling down there at their destination. They tell the controller that the visibility is now good enough, but that they'd like another hundred feet of ceiling. It sounds so bush. I imagine them sitting there in the cockpit telling 'so there I was' stories about holding over Moosonee, expecting it to clear, but having to decide whether to expend the precious fuel on flying to Timmins, which might itself fog in, or maybe make a run all the way to Rouyn. Meanwhile their automatic airplane probably flies the hold for them.

There's another NDB NOTAMed out of service somewhere, possibly just went down today, as pilots keep asking for an approach that uses it and asked for their intentions vis-a-vis the unserviceable nav aid. Most of them seem to not have heard about it. Someone asks if he can get vectors for the ILS and the controller says no, you have to fly the full procedure, can't see you down there.

The airline crew asks for the approach, and are cleared for the same combo plate conventional ILS approach with an RNAV missed. "Have a good day," says the controller, an oddly non-specific salutation for the situation, and the pilot says he hopes not to talk to the controller again very soon. We don't hear that airplane again, before we ask for our own descent, into somewhere else, so presumably he got in that time.

Saturday, June 29, 2013

Northern OFP Notes

After take-off I routinely scan the instruments. The left oil temperature is a little high in the climb. It's no concern. The summer heat is here. I climb at a slightly higher speed: that probably sounds contradictory, but that means I leave the power the same and lower the pitch of the nose slightly, giving more airflow through the oil cooler. And I leave the cowl flaps open until after level off. I usually close them a couple of hundred feet below the target altitude.

I'm flying in the north. It doesn't really matter north of what. Every province turns from roads and fields to rocks and trees and lakes as you move north. We're in the north and some of the lakes are still partly frozen. I can't tell if the rocks or trees are frozen, given that they remain solid summer and winter. Also there's smoke again, another constant of the north. Water from the lakes evaporates. The sun heats up the rocks, causing the moist air to rise into thunderstorms which unleash lightning, setting the trees on fire, hence the smoke. The only relief from this is when winter comes and the lakes freeze. Or you get far enough north that you run out of trees. Lichen doesn't support much of a fire. I make a note on the OFP to get maintenance to check the air filters early, and keep flying.

I wrote a few other notes on the OFP to share with you.

"We already nuked the strip." I didn't write down the context for that, but obviously it's Centre's line. The "strip" is the data on where an airplane is going and what clearance they have to get there. It used to be a literal strip of paper, but now it's just data in a computer. Someone must have cancelled IFR and then wanted something that required ATC to have the just-deleted information. It was probably funnier at sixty degrees north.

I'm pretty sure that if I had been able to hear the response to the ATC call "German Air Force 55 heavy, what are your intentions here?" I would have written it down, so we'll all have to wonder together.

An airline pilot was told, "You were cleared for an IFR approach, not a circling." The answer was a testy mumble followed by ATC saying, "Now you're cleared for it all." ATC aren't that forbidding, you just have to ask for what you want before you do it.

The OFP also contains a note about how much I would like to eat BBQ shishkababs.

Friday, September 07, 2012

Logical Deductions 101

This post might have followed this post had I blogged things in the order of the notes I made for you. See, I still make notes for you. I make them right on my OFP, my operational flight plan, an official document of sorts which my company has to keep on file for years, or at least months, I don't feel like remembering which. It (this post) still follows it (the other post). There are just intervening things. That's what life's like.

In that post, which was mostly about canola, we had to backtrack a runway, and make other traffic wait for us, after landing despite what appeared to be a perfectly serviceable crossing runway that led back to the taxiway. The other runway was closed. Now for the exciting conclusion.

The next day on preflight inspection I find grass clippings on my aircraft. (Disclaimer, they could have been canola clippings). This isn't completely bizarre. In the last month I have found things as diverse as mouse intestines, dime-sized purple blobs, and fluffy weed seeds on my airplane. I suspect a messy owl dining atop my vertical stab, birds that had previously eaten purple berries, and fluffy weeds, respectively. The last one really doesn't require much in the way of logical deductions, but it still needed cleaning off.

I start up and I listen to the ATIS, which tells me that that the other runway is closed now and the previously closed one is open. There wasn't anything wrong with the one I landed on yesterday, and if they were painting or sealing or something they'd be smart enough not to mow, wouldn't they? It turns out the runway is closed for mowing. They need to close the whole runway for mowing?  It's a paved runway. They don't have to mow the runway itself. I'll bet I have landed more than a hundred times at airports with only one runway, while mowing was occurring. Sometimes there's an elaborate procedure whereby the controller advises the people with the tractors to remain clear of the runway. Sometimes they just publish a NOTAM or say on the ATIS that mowing is in progress. And sometimes you're on short final and it's like "SURPRISE! TRACTOR!" crossing the clearway. But we're pilots. We deal with these things. But that's not apparently how you do it when you have two runways.

The airport is busy. Lots of landing and departing traffic and there's a Nav Canada Challenger jet flying dozens of passes from different directions. I hear they are planning a new RNAV approach into here. I did the DME/LOC the other day, testing the autopilot, and it was pretty usable. You come over a wide canyon on the way in, so no obstacles letting the designers give you a low enough MDA that I had my hands very right there, should the autopilot decide at any moment that now would be a good time to dive. It didn't.

Also my coworker has brought five separate pairs of footwear. I have one: I fly, go to dinner and work out in the same shoes. So why does his luggage weigh so much less than mine?

Monday, August 15, 2011

ForeFlight versus Nav Canada

A company called ForeFlight has released data for their iPad app that covers IFR procedures in Canada. It includes all volumes of the Canada Air Pilot (approach and departures plates, plus taxiway diagrams) and the IFR high and low enroute charts, and is legal for inflight IFR use. It's not clear whether the database includes the terminal charts, but it kind of has to because the information density around the big cities isn't sufficient in the regular LO charts. It doesn't seem to include the CFS data, but I can't think of information you need for safe IFR navigation that is in the CFS but not the CAP. We'll also have to wait for VFR chart data. Nav Canada is not forthcoming with its data.

There is Transport Canada guidance document and an FAA equivalent governing Electronic Flight Bags, as these systems are called. Page ten of the US version explains how the paper documents can be completely phased out once the system is verified reliable in a given operation, and wording in the Canadian version implies that it allows for completely paperless applications as well.

This isn't something astonishingly new, and I'm sure lots of you are already using such products. What caught my attention today was the price. As far as I can tell, you download the core of the app for free and then pay to add a subscription to the data you need. A ForeFlight Canada subscription costs US $149.99 for a year. For comparison, a subscription to all the editions of the CAP and the high and low charts costs $441 a year, plus taxes. If you only fly in only two regions of Canada, an annual mailed subscription of paper charts will cost you $142, so if you already have an iPad, that's the same cost for paper or electronic. The iPad is probably also about the same weight and the same difficulty to stuff in your flight bag as one LO and one region of the CAP.

Advantages of paper documents over the iPad are that they are unattractive to thieves, still work after they have been dropped or slammed in the trunk door of a cab, will probably dry out to a usable state if you get drenched by rain, are better for starting a fire in an emergency situation, you can write clearances on them, you can unfold them all over the hotel bed to have a wide-screen view of your proposed trip, and the batteries cannot run out. Also they make good auxiliary sunvisors, if you don't have a newspaper.

The iPad wins on staying the same size even if you are flying in all seven regions of Canada, being self-illuminated, allowing scrolling without having to flip the map over, letting you zoom the scale in or out and it probably has a search function. I don't know if you can mark it up with virtual post-its, but you can play Plants versus Zombies on it and check your e-mail while waiting for maintenance to release the aircraft.

What's it like flying with one of these? Does it have a function to do your cold weather corrections automatically or is there a way to mark up a plate after you get the latest METAR, to show all the cold weather corrections and the time to go on a non-precision approach? An iPad seems kind of bulky to mount on the yoke. Where do you put it? How far did you get on Plants versus Zombies?

Tuesday, July 26, 2011

Now It's MY Way

My camera still isn't ready. This is like airplane maintenance: they have to wait for the parts to arrive, and can't say when that will be. The DG works, though. They tell us that it was installed incorrectly to begin with, with not enough screws, and there wasn't even a hole for the missing screw. Odd that it worked for so long.

We're going to Vancouver again, but the GFA shows IFR conditions en route with mixed moderate icing to 16,000'. I look at the shape of the forecast areas in space and time, and judge that by my route and at the time I will pass through the area, I will be safe to file at 16,000'. On V304, that one-way airway I was told I couldn't use earlier. At most I expect a few tendrils of ice-bearing cloud above that altitude and I should be able to get a deviation around them.

The actual weather observed for the first part of the route shows the GFA to be startlingly accurate. The brown scalloped line dividing two types of weather went right through the dots representing the three Edmonton area airports that report weather, and overhead Edmonton there's a cloud shield with its edge running so precisely along that line I wonder if I'm in a simulator. I can see the International, half of City Centre and none of Namao. At sixteen thousand I'm also comfortably above the clouds, for now. And the new heater is still working. Groundspeed is low, though. The operator can see the ETA on the GPS and asks about it, because it's a good bit later than I suggested at the departure briefing. "Will we have to stop for fuel?"

"I'm not planning a fuel stop. This should switch to a tailwind as soon as we get into BC."

The clouds rise ahead of us, some convective shapes, which is why the forecast calls for icing even though it's well below freezing. A pilot expects ice in visible moisture (i.e. cloud, mist or rain) when the temperature is close to freezing, because more than a few degrees above zero, water droplets don't freeze and more than ten degrees below freezing and most of the water is already frozen, thus is unavailable to freeze onto your airplane. In convective cloud there is a lot of rapid vertical motion, so liquid water can be churned up from below into the cold levels above. The GFA is again amazingly accurate at forecasting these clouds sitting just at 16,000'. It is a tremendous economic and safety benefit to have such good forecasts. Anyone who works in Edmonton or Montréal putting out these charts, be proud.

A little further on there are a few tendrils of that cloud poking above 16,000'. I flip on the pitot and prop heat before passing through cloud tops, emerging with just a skim of ice on the windscreen and wing leading edges. It's useful to me to note where I see ice first on this airplane. Out in the sunshine again the ice sublimates. I dodge a few tops and then I'm into another cloud for a bit longer. Yeah, I guess now that I know (I believe I have Sarah to thank for the link) that there's ice in there it's time to enact my avoidance plan. I call ATC to climb a couple of hundred feet. They give me a just a moment, then call back with "flight level 200 approved." Uh, that's a bit more than I need. As I apply power to go up I realize what they heard. I explain that I need "two hundred feet" not "FL200" and they assign me 16,000' blocking 17,000'. Perfect. I'm out of all ice and have a nice view and clean wings. There's an overcast in the vicinity of Vancouver that could be interesting, depending on where they hold me. The freezing level is right around the forecast cloud tops. If necessary I can ask for an expedited descent though the region of icing, but I don't expect much, just light rime for a few hundred feet. It will be warm enough below to melt any accumulation off before final.

The headwind switches to a tailwind, an even better one than I had planned on. We'll be a little bit early. The clouds are thinning a little and I can see mountain tops poking through. It's hard to believe that we're over 2000' above the minimum obstacle clearance altitude. The rocks look to be right there. They always do, whenever you fly an IFR procedure in visual conditions, too. The controller asks me if I'm done with the altitude block and I am. The clouds are lower and this type of cloud shouldn't have ice at this altitude, either.

I've put the en route frequency up on COM1, my listening radio and am looking for a good FSS frequency to call to find out what to expect at Vancouver when the operator starts reading me METARs off his iPhone. Is this the way of the future? The FSS won't have anything more current than the METARs, so I try Vancouver's ATIS. I'm still too far out, but at least I have it tuned and ready.

I review the published arrivals for Vancouver and after the next frequency change tell the controller I'm ready for a descent. I'm not pressurized, so it would be nice not to have to dive for the airport at the end. He gives me a couple of descents, first down to fourteen thousand then ending at ten thousand feet, which is just above the cloud deck, and just at freezing. I'm laughing. Everything below me is above freezing, so I don't need to worry about ice on the descent. The controller tells me information charlie is current, and to expect a runway eight.

I'm still unable the ATIS, and I already have a post-it flagging the non-RNAV arrival for the 08s at YVR. I flag and review the ILS for 08R, the runway that goes to the non-secure side of Vancouver airport. I'm coming down V304 towards the airport, but so is everybody and I'm slow. They vector me off the airway, to the north which is a little unnerving, because I'm in IMC and that's where the mountains are, but then they vector me south, to the other side, and then east, away from the airport, descending me to 5000', then 3000', then another vector then another. I hear them advice an American Airlines that they are doing a runway change, so I pull up the approach plates and find the pages for the other end of the runways. The controller tells me to expect 26R, that's the big girls' runway. I tune and identify the ILS and accept another vector, and a descent clearance to 2000', which I'm told to expedite, then another runway change to 26L. I intercept the localizer and am immediately visual and cleared to land. You know, I'm glad I have the autopilot. That was a crazy disorienting set of vectors.

It's actually quite nice at the airport. The weather is all to the east. That's good, because we have work out to the west. Tomorrow.

There's a Comfort Inn right near the airport, but like most of the places I stay, I don't have a chance to enjoy more amenities than the bed and the internet, which tells me the weather will be good again tomorrow, so I should be prepared for an early start.

Saturday, July 02, 2011

The PPC Ride

The examiner holds up to ask someone to let a student know she is going to be late for the lesson following my flight test, so I have a chance to go ahead and verify that no one has run into the airplane while it sat there, and that nothing is leaking out of it. Hour eleven of my duty day is beginning as I climb into the pilot seat. I welcome the examiner on board and quickly brief her on the location of emergency equipment. I set my prefolded charts where I can reach them and get myself buckled into my seat. The airplane starts nicely and I record the time then start working through checklists, explaining what I am doing. I made a list of which frequencies to put on which nav aids to get going, and I pre-identify what I can. I have an ADF not an RMI so I do what I always do with these and set north to the top, explaining that is to prevent me from mistaking it for an RMI and thinking it shows the correct heading. I also note to her that the GPS database is expired, hence the prominent NOT FOR IFR USE label across the bottom of the screen. I tell her she's welcome to use it for situational awareness if she wishes. I love it when the examiner has something interesting to look at so I don't freak out from the scrutiny while doing basic preflight checks.

I copy the ATIS and then call for clearance. Someone should tell them to speak slowly. I had to ask for two parts of the clearance to be repeated before I could write it down and read it back correctly. The clearance, from my notes, appears to be B △ eva 1/B M70 Rrr 'u 4616 7600 on caus followed by A 2Z91 X25 125.42. This apparently all meant something to me at the time, because I taxied out. The examiner tolerated my careful pauses at each intersection while I consulted the taxi diagram for the airport she knew her way around perfectly. After I was clear of the parking area and established en route to the runway I made some small turns and rattled off "turning left, wings, er stick left, decreasing, decreasing, steady, steady," for the various instruments that should and should not respond to directional change on the ground. I told her that as this was the airplane's fourth flight today I would not be doing a run-up, if she was comfortable with that, and she was. The examiner had much better handwriting than me, because I remember seeing something akin to "confident and comfortable in the cockpit" written on her clipboard. I can read pretty much any way up. I didn't realize that was a thing everyone couldn't do until I saw it posited as a trick. I have a moment of "got her fooled" but that's washed away by a realization that I've lived in this cockpit for the last few days, and I do know how to fly, even if I don't have the recent specific experience common to students who have trained here.

I switch to tower frequency when I'm ready to go and they clear me for takeoff. Roll, straight, rotate, going up, going up, gear up, fly straight, climb speed, trimmed, after takeoff checks. I switch to terminal and they radar identify me and clear me direct the NDB. Level off, call level (even though I don't have to, and I'm not hinting for anything). Now concentrate on tracking to the NDB. I get two sets of marks for this, one for en route procedures and one for ADF tracking. And I'm doing it nice and straight. I'm as proud of this as a kid who can tie her own shoes. A basic skill done well. Now I have to keep doing it while doing something else: copy a hold clearance.

It looks like + U D> M70 HN IB 160 <FC 0045. That makes way more sense than the previous clearance, so I must be improving. If inbound is 160 then outbound is 340. With no explicit instruction on the direction of the turns, they must be to the right. I look at the ADF, by which I'm tracking to the NDB, and see that it falls just to the left of the top of the instrument, which according your basic flying school rules indicates a parallel entry, an initial left turn to 340, followed by a left turn to intercept the inbound track and then subsequent right turns on crossing the station. And I'm still tracking like a pro. I tell the examiner my intentions and she asks how it can left turn. Because on a parallel entry you start by going the wrong way ... and I'm an idiot. I'm looking at an instrument that is set to north and not to my course. Three forty is almost directly behind me. They have given me the easiest hold in the world, and I should have anticipated it, because it's the logical hold to give me, and because a sensible pilot would have been thinking about holding at the NDB the easiest way instead of being all proud she could tie her shoes. I know I would have caught that when I looked at the actual heading indicator to make the turn, but jeeeeez, HOLDS, why do I always find a new and exciting way to screw up my holds?!

I enter the insanely simple direct hold. I start the timer in the right place, I turn at the correct second, I have to bank a little more intercept, I time inbound, I declare the required outbound timing and outbound heading and both the intercept and time to station are to the degree and to the second. Not that it matters, as she has only the choice between "major error" and "fail" for my inability to state the correct entry without prompting. They don't have to tell you you've failed or stop the test on the first one. I should put a post it on the ADF: 'this is not an RMI.'

Crossing the NDB, the examiner asks for a block of airspace and now I'm visual to do the manouevring part of the test. A steep turn, which only passes because they don't fail you if you promptly correct excursions from tolerances, and a stall recovery, executed correctly, including the flaps first, then gear order peculiar to this airplane. What else is in the airwork? Maybe that's it. Slow flight included in the stall demonstration, I guess. Back to IFR. They clear me for the VFR-only full procedure approach at the NDB. It's direct the NDB, hockey stick, outbound, timer, don't forget to reset the DG, monitor the morse code for the NDB, turn 45 degrees, see the terrain on the GPS, yikes, no wonder this is not for IFR use. Fly out the time, hold altitude, turn inbound, established within 5 degrees of the inbound track I can start descent to the first stepdown. Reset the DG again. It drifts fast during turns at low power. Man, how is it even legal to do IFR NDB approaches with out a slaved gyro? It's never set to within two degrees. The examiner has set the correct radial on the GPS but I focus on the DG and ADF to track as well as I can, step down, step down, MDA. Should be visual, no contact. The examiner shows me the aerodrome off to the side and makes a note for herself that the track she gave me was not ideal. Unlike the VOR radials I discussed earlier, tracks to an NDB depend on magnetic fields, so they shift when the magnetic poles do, thus a long-outdated IFR approach based on an NDB no longer leads to the runway.

I fly the missed. There must have been a simulated engine failure in all that, as she gave me back my engine after the missed, and then cancels IFR then gets me a clearance for a simulated straight in ILS back to the airport we came from. I tuned the localizer before I left, and set the inbound track, because there weren't any VORs en route, so now all I have to do is slow to approach speed, double check the identifier and follow the vectors to intercept it. I'm cleared to do so. "Loc alive!" Set the DG again and intercept. I overcorrect for a moment, then settle down. Staring at the instrument, I see that it's one of the kind with dots on them. Most of them have dots, but now I'm laughing inside myself at the dots. MORE DOTS! This is what I do all day. I put that needle right in the middle of the dots and pin it there. "Glideslope alive!" It's one of the glideslope indicators that hinges at the side like a drawbridge. I put the gear down as it swings just before level and then put the nose down and descend on the glideslope. I need to pull the power back a bit more, otherwise the turbocharged engines give me more power as I descend and I'll get above the glideslope. Despite the fact that I'm descending on the glideslope, I am given a "not below" clearance, and I reach that altitude while still on the glideslope. I hold altitude and watch the needle drop away below me, until the restriction is lifted then I ask the examiner what she wants me to do. She tells me to recapture the glideslope. I tell her I would normally conduct a missed, not dive for a glideslope, but I do manage to get it back just before reaching the circling altitude. I circle out, mentally choosing points that represent my circling limits, but just as I put down my gear to start turning in, the tower asks me to extend my downwind, they'll call my base. I should have taken the gear up again, but instead I let my speed decay and make the examiner nervous before I'm finally cleared to turn in and do my touch and go. I grin to myself, glad I did one this morning. As I turn crosswind, the examiner says she wants the next landing to be flapless. Ha ha. I admit straight out that I haven't landed this airplane flapless before, that there's no checklist, but that I'll have a shallower approach angle, higher approach speed, more runway... While I'm babbling the examiner grabs the left throttle and pulls it to idle. "This should help you get down." I simulate feathering the propeller and securing that engine and it so happens that as her simulation has taken out my hydraulics, this would be a flapless landing anyway. I simulate activating the gear electrically, and wouldn't have chosen to pump down the flaps with a runway of this length. She tells me I can have the power if I need it, but I entirely forget in the flare that the "zero thrust" simulation that the examiner has set is actually not zero thrust and the residual power, afternoon warmth and lack of flaps prolongs my touchdown so far it's funny. I stop and turn off at the end.

After landing checks done, I ask the examiner for suggestions on where to park and she gets the taxi clearance for me and gives directions. There's a whole back lot full of interchangeably anonymous hangars. It's like the last scene in Raiders of the Lost Ark. If I park the airplane back here I'll never find it again. The examiner knows that there is no airplane in this hangar and that the owner won't be here for a while, so it's okay to park in front of it. She's now late for her next lesson, so the debriefing will be in the morning, at 7 a.m.

"Can you please at least tell me if I can tell my company I passed?"

"You passed."

If she had made me wait, you had better believe I would have made you wait. Most of them do. I really wonder how bad some pilots must be, that they are worse than me and actually fail these things. Is my expectation of the world just too high? Like the fact that my customer today said he thought I was the most punctual pilot he had ever worked with. I mean what? How can you be more punctual than on time? And how can your job be to file a flight plan saying you will take off at 1430, and not be sitting at the hold short line waiting for a take-off clearance at 1429? Most of the job that isn't memorizing and practicing emergency procedures is calculating how long things take, and writing that down in four places.

The examiner takes her paperwork and leaves while ponder these things, fill out the journey log and gather my belongings.

There's a young man sitting in a C172 parked on the apron without the engine running. I say hi and ask him if he's practicing emergency procedures. He says no, he's just waiting for his instructor. I apologize, explaining I'm the reason she's late, and hoping I haven't got her in a bad mood for him. He's relaxed about it. He's working on his initial private pilot licence, trying to get landings right. The instructor in me makes me ask what the hardest part is. Not that he doesn't have a very competent instructor, but sometimes even the same words from someone new trigger something. He says just getting everything done, sometimes they work out and sometimes they don't.

The operator has gone to meet with a client, and left me with the name of a hotel where we have reservations, and instructions to get a cab there. I go and find a phone at the flying club and call one. They say I'm first in line for a cab in the area and when I ask how long that might take the dispatcher repeats You're first in line for a cab in your area! I should have hung up and called another company. I'd rather be treated with respect than have an uncracked windshield. But I say whatever and wait. There's another pilot at the club and I express some of my "phew, flight test over" relief to him and he recognizes which airplane I must have been in, from the examiner's voice getting my clearance. He was in the airplane that interrupted my ILS approach, and apologizes for that. I tell him that really it helped me out, because the closer to the airfield I get, the harder it is to keep the needles centres, so breaking me off early made me look better. I go out to wait for the cab. I wait a while. Rude and slow.

The driver is a lot nicer than the dispatcher. He turns out to be an IT guy taking a break from his career. I have supper and should be ready to collapse, but I'm still kind of wired. Maybe that was especially potent coffee. I call the front desk. "Do you guys have a swimming pool or something?" She doesn't even say 'yes,' just gives me directions. The pool has a bunch of kids in it, and I join them on the waterslide, making sure it's all clear below before I launch myself down it. It's a good one! They compliment me on my happy shrieking. One of the 'kids' turns out to be the mom. I tell her I'm decompressing from a flight test, which leads to the usual conversation about what airline I don't fly for. I tell her about taking pictures at Slave Lake and get a blank look.

"Oh, what province are you from?"

"Alberta. But we've been away."

They've been away for six months. The parents have jobs that allow them to work via the internet for a good portion of the year, and the kids are homeschooled, so they've just been travelling. "Oh where?" I ask.

"Everywhere. The whole world."

Wow. I ask about some countries I'm interested in. Cambodia? She doesn't know where it is. I tell her. No, they haven't been to Asia. Or Africa. Or South America. Or Central America including Mexico. She hasn't heard of Estonia. Hasn't been east of Germany. They have been only been to countries dominantly populated by white people who speak germanic or romance languages. I wouldn't challenge your right to call a vacation covering the UK, Australia and Western Europe a world tour, but if you're home schooling your kids, they have to know that that is not "everywhere - the whole world." She has a reason, though, but a kind of weird one, for not wanting to go to 'those places.' Her partner, not currently in the pool area, is from the Caribbean, and dark skinned, so her kids look like 'their kids.' She's afraid that they will be mistaken for locals in one of those places and taken for slaves, because that happens there. I don't know where to start. I'm not going to touch the paranoia that goes with a mother's love, or her subscription to "all brown people look alike," so I tell her that in Cambodia, children in slavery are usually sold by their own parents to feed the others in the family, or by luring runaways, not by snatching the children of the wealthy. I'm pretty sure that's the way slavery works most places these days, because capturing people that the authorities would come looking for is bad for business. I try to express that just because a country doesn't have the same standards or the same traditions as Canada, that it isn't a place you can travel safely. I've never travelled with children, but if they'll eat what's available, sleep where you tell them to and have the basic sit stay and recall training of a pet dog, I think they could enjoy travel, to the whole world.

And at the end of the day-- and it really is the end of the day--it makes me wonder how fundamentally broken my world view is. I need to see more of it, and look harder at the places I already am. I spend a few minutes in the really hot hot tub, then go to bed.

Sunday, March 20, 2011

Holding Speeds

In a faster airplane, I suddenly have to start thinking about things that never were an issue in slower ones. Suddenly stuff I skimmed over, like noise abatement rules, advisories to remain below 165 knots in the climb until above a certain altitude and engine-specific rules become relevant. For some reason I loved the 250 and 200 knot speed restrictions when I learned them in private pilot groundschool, but I've never needed to care. Here are the rules from the CARs:

602.32 (1) Subject to subsection (2), no person shall

(a) operate an aircraft at an indicated airspeed of more than 250 knots if the aircraft is below 10,000 feet ASL; or

(b) operate an aircraft at an indicated airspeed of more than 200 knots if the aircraft is below 3,000 feet AGL within 10 nautical miles of a controlled aerodrome unless authorized to do so in an air traffic control clearance.

(2) A person may operate an aircraft at an indicated airspeed greater than the airspeeds referred to in subsection (1) if the aircraft is being operated in accordance with a special flight operations certificate - special aviation event issued pursuant to section 603.02.

(3) If the minimum safe airspeed for the flight configuration of an aircraft is greater than the airspeed referred to in subsection (1), the aircraft shall be operated at the minimum safe airspeed.

602.33 No person shall operate an aircraft at a true Mach number of 1 or greater.

Okay, that last one isn't an issue just yet, but who knows, eh?

It's also the first time I'll be legally required, as opposed to just being sensible, to slow down in a hold.

10.7 Speed Limitations

Holding patterns must be entered and flown at or below the following airspeeds:
(a) Propeller Aircraft (including turboprop)

(i) MHA to 30 000 feet 175 KT IAS

(b) Civil Turbojet

(i) MHA to 14 000 feet 230 KT IAS

(ii) above 14 000 feet 265 KT IAS

(c) Military Turbojet

(i) all except those aircraft listed below 265 KT IAS

(ii) CF-5 310 KT IAS

(iii) CT-114 175 KT IAS

(d) Climbing while in the holding pattern

(i) turboprop aircraft normal climb speed

(ii) jet aircraft 310 KT IAS or less

Minimum Holding Altitude (MHA) – The lowest altitude prescribed for a holding pattern which assures navigational signal coverage, communications and meets obstacle clearance requirements.

I love how all the military section says reduces to, "Look, unless you're a CF-5 Freedom Fighter, you're just a jet. And Snowbirds? You're not really a jet."

So that's holds. Airplanes are so fast, but just when you think you're going somewhere, you find out that you have to slow down and circle back. For the approximately two people who still remember what this post means: yeah, I'm serious.