tag:blogger.com,1999:blog-10000144.post7428982713880038278..comments2024-03-13T09:47:40.487+00:00Comments on Cockpit Conversation: Holding SpeedsAviatrixhttp://www.blogger.com/profile/13634111275860140084noreply@blogger.comBlogger10125tag:blogger.com,1999:blog-10000144.post-78474290308823334932011-03-22T17:50:25.131+00:002011-03-22T17:50:25.131+00:00Congratulations!Congratulations!Travellerhttps://www.blogger.com/profile/17263645693176777616noreply@blogger.comtag:blogger.com,1999:blog-10000144.post-37821256131161183092011-03-21T18:45:56.906+00:002011-03-21T18:45:56.906+00:00Empathetic nods here. I'm transitioning from ...Empathetic nods here. I'm transitioning from a fixed gear 4 seater to a very clean high powered retractable with 5 or 6 seats. Everything is happening much faster, and I have to think well ahead of the plane. At least I don't have to be concerned about speed regulations - it's not quite THAT fast.D.B.https://www.blogger.com/profile/16311812701887962320noreply@blogger.comtag:blogger.com,1999:blog-10000144.post-45514929533071329362011-03-21T13:49:44.067+00:002011-03-21T13:49:44.067+00:00Actually I doubt that either the A380 or the 747 h...Actually I doubt that either the A380 or the 747 has any real problem with 250kt. I've actually been on the flight deck of a 747 at MGTOW during departure from LAX where we were limited to 250kt due to traffic in front of us. The only issue with 250kt is at MGTOW: the climb rate is pretty anemic. <br /><br />Comparted to most Airbus Aircraft, the A380 has a relaively lightly loaded wing, so I would be very surprised if 250kt was an issue.<br /><br />Concorde could be operated at 250kt at MGTOW, but it was something they tried to avoid. In an engine out situation, 250kt would be 'unsafe'. Most tried to make it a priority to get to a more desireable part of the flight enevelope ASAP after departure.<br /><br />Concorde just didn't handle or behave very well at low speed and hight TOW (Delta wings have poor L/D performance at low speeds).<br /> <br />Minimum drag speed on Concorde at MGTOW was reported to be about 370kt. By contrast on most aircraft, Minimum drag speed is somewhere near V2.mattheww50https://www.blogger.com/profile/00898846687006155502noreply@blogger.comtag:blogger.com,1999:blog-10000144.post-60702014729855417092011-03-21T05:26:33.028+00:002011-03-21T05:26:33.028+00:00It's a win-win, right? Having noticed a tellin...It's a win-win, right? Having noticed a telling comment elsewhere, I was wondering about the time delay. Sounds like it's about two weeks.Anoynmoushttp://anoynmous.blogspot.com/noreply@blogger.comtag:blogger.com,1999:blog-10000144.post-4697411560550336482011-03-21T05:02:40.586+00:002011-03-21T05:02:40.586+00:00Yeah, congrats!
The F-116 (aka CF5, aka F5 Talon ...Yeah, congrats!<br /><br />The F-116 (aka CF5, aka F5 Talon fighter, aka T-38 astronaut killer) does NOT like to go slow, so they need that extra speed to remain optimal (controllably airborne).majrojnoreply@blogger.comtag:blogger.com,1999:blog-10000144.post-39312914841760017572011-03-20T21:55:03.506+00:002011-03-20T21:55:03.506+00:00Congratulations!Congratulations!Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-10000144.post-35917429171206820722011-03-20T21:01:09.631+00:002011-03-20T21:01:09.631+00:00Two comments...
First: I'd be curious to hear...Two comments...<br /><br />First: I'd be curious to hear from somebody that's flown the <b>Big</b> iron about subsection 3 - minimum safe airspeed. I haven't seen the POHs, but I'm guessing that a 747 or A380, and certainly the Concored, have (had) minimum speeds above 250 kts with no flaps. So, do you guys bomb along at Flaps 10 until above 10K, or does subsection 3 exempt you?<br /><br />Second: Poop!GPS_Directhttps://www.blogger.com/profile/00900545332230106711noreply@blogger.comtag:blogger.com,1999:blog-10000144.post-11698771054397166392011-03-20T12:41:39.683+00:002011-03-20T12:41:39.683+00:00Subtle differences in air law between countries: i...Subtle differences in air law between countries: if I recall correctly in the UK the 250 kts below 10,000 (FL100, actually, I think) can also be exempted by an air traffic control clearance. There was some discussion as to whether the phrase "no ATC speed restriction" constituted such a clearance. (Anonymous, anybody who wanted over 200 knots in the climb would just get a clearance. Is it specified on the departure plates?)<br /><br />About a decade ago we spent a wet Sunday afternoon at my then-local gliding club with the books out trying to work out how a non-instrument rated member could legally fly the Jet Provost he had a share in at maximum speed at low level. Some class D airspace over the Bristol Channel looked like the best bet as I remember it.Ednoreply@blogger.comtag:blogger.com,1999:blog-10000144.post-46943274440194607012011-03-20T01:20:35.593+00:002011-03-20T01:20:35.593+00:00Damn.Damn.Jnoreply@blogger.comtag:blogger.com,1999:blog-10000144.post-30899855150231777502011-03-20T00:25:32.355+00:002011-03-20T00:25:32.355+00:00does (b) mean that you cannot increase to speeds o...does (b) mean that you cannot increase to speeds over 200 knots under 3000 feet during climb from any airport?<br /><br />Love these posts btw!Anonymousnoreply@blogger.com