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March 31st, 2004, 04:59
| #1 |
| Junior Member  Join Date: Dec 2003 Location: North East; KFRG
Posts: 66
|  MD-80 Stall?? I heard that stall in a MD-80 is unrecoverable. Is it true? Why would someone make an a/c with such a negative stability? |
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March 31st, 2004, 08:20
| #2 |
| Junior Member  Join Date: Jul 2003 Location: Portland, Oregon
Posts: 277
| Re: MD-80 Stall?? Not sure about the MD-80 specifically, but I've been told many large aircraft don't recover well from stalls. They're nothing like the small aircraft. They're designed for efficiency. Perhaps one of the heavy metal pilots can elaborate. That's probably why demonstrating stalls for the ATP rating goes like this... Recover, if you get a stall horn Recover, if you feel any buffet Recover, if you feel an impending stall Recover, if the guy next to you feels a buffet Recover, if you hear the word stall  Recover, if somebody says a word that rhymes with stall (like mall)  Recover, if you fly over something that rhymes with stall (like a mall) Seems like the progression of certificates starts with emphasis on recovering from stalls as a private, to ovoiding stalls as an ATP. |
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March 31st, 2004, 08:36
| #3 |
| Senior Member  Join Date: Jul 2002 Location: Atlanta, GA
Posts: 869
   | Re: MD-80 Stall?? well if the handeling is anything like 747s in FS that seems accurate, you stall that thing and you kinda go into a wacky 'flat stall' decending at about 10,000fpm and unable to get the nose down or much forward airspeed. But FS has never been known for its accurate large aircraft handling chartaristics. Hum I'm curious now, might have to go try that out on PS744 tonight. |
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March 31st, 2004, 09:04
| #4 |
| Senior Member  Join Date: Jan 2003 Location: Low Earth Orbit
Posts: 1,347
| Re: MD-80 Stall?? [ QUOTE ] well if the handling is anything like 747s in FS that seems accurate...might have to go try that out on PS744 tonight. [/ QUOTE ] I wouldn't believe anything that happens in flight sim games. They are for entertainment. Even the Level D sims at Flight Safety and Boeing do not accurately replicate all flight attitudes. For a simulator to replicate a certain scenario, data must be compiled in the actual aircraft and downloaded into the simulator. So we can do full stalls and spins in the sim, but that doesn't mean that the real aircraft will respond the same way. Sure the sim will do a loop and a barrel role, but unless the flight test data was compiled for a maneuver, all the sim is doing is moving the visuals in response to a control movement. |
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March 31st, 2004, 14:00
| #5 |
| Administrator  Join Date: Feb 2003 Location: Pinal Airpark
Posts: 6,897
| Re: MD-80 Stall?? [ QUOTE ] [ QUOTE ] well if the handling is anything like 747s in FS that seems accurate...might have to go try that out on PS744 tonight. [/ QUOTE ] I wouldn't believe anything that happens in flight sim games. They are for entertainment. . [/ QUOTE ] WHAT?? I can fly darn good Cat III ILSs in my Virtual Airline Pilot flight sim! How hard could it be in the actual plane? Since I'm so good at knocking down MiGs and bombing targets in my Virtual Air Force pilot game, I should be given a step-up in AF UPT! Flying fighters and airliners isn't really that hard. I don't know why those guys that do it for a living complain so much about money and time off......  |
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March 31st, 2004, 14:14
| #6 |
| Senior Member  Join Date: Jul 2001 Location: Houston, TX
Posts: 1,021
| Re: MD-80 Stall?? Many large T-tail aircraft with rear-mounted engines and swept wings are susceptible to the deep stall, or superstall. In this stall, the turbulent wake of the wings, engine nacelles, and flaps causes the tail to be completely ineffective. This stall is characterized by a very high nose-up attitude, and is generally not recoverable. Kind of like falling tail-first. Such aircraft have a "stick shaker" and "stick pusher" installed to prevent ever reaching an angle of attack that could induce a deep stall. Other manufacturers such as Falcon have anhedral designed into their horizontal stabilizers, which also solves the problem. I'm not sure if that solution would work if applied to a very large transport like the MD-80/90/DC-9/etc. |
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March 31st, 2004, 14:58
| #8 |
| Senior Member Join Date: Jul 2001 Location: Houston, TX
Posts: 1,021
| Re: MD-80 Stall?? Good point! |
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March 31st, 2004, 16:00
| #9 |
| Old Skool  Join Date: Jun 2003 Location: Memphis, TN
Posts: 13,634
 | Re: MD-80 Stall?? Dead, and leaning backwards with a death grip on the yoke. |
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March 31st, 2004, 22:25
| #10 |
| Old Skool  Join Date: Sep 2001
Posts: 2,044
| Re: MD-80 Stall?? Actually, the stall characteristics of most of the transport jets is fairly docile in most configurations. There are limitations to that, of course. |
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April 1st, 2004, 10:25
| #11 |
| Newbie Join Date: Mar 2004
Posts: 7
| Re: MD-80 Stall?? The book "Fly the wing" from Jim Webb describes the stall series in the DC-9-14 and also some interesting recovery techniques based on the aerodynamic characteristics of the aft engine/t-tail aircrafts. Well worth reading. |
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April 1st, 2004, 10:52
| #12 |
| Old Skool  Join Date: Dec 2002 Location: Utopia
Posts: 12,477
| Re: MD-80 Stall?? [ QUOTE ] I wouldn't believe anything that happens in flight sim games. They are for entertainment. [/ QUOTE ] So, I take it that you're not a gamer.... |
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April 1st, 2004, 20:45
| #13 |
| Senior Member  Join Date: Jul 2002 Location: Texas
Posts: 514
| Re: MD-80 Stall?? [ QUOTE ] If you stall a jet, after stick shakers, aural warnings, stall warning lights, stick pushers, etc, you're probably already dead! [/ QUOTE ] Umm...actually a FalconJet stalls like a big Piper Warrior. The Falcon has no shaker, no pusher, no warning lights...just a very mild horn. Lears can also be stalled, it's a requirement after a 12-year check to do full stalls, among other manuvers. |
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