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The vertical acceleration shows a curious pattern. It is not possible for the plane to be controlled in such a way as to produce a motion with the observed high frequency of reversal. It therefore seems likely that some part of the plane is fluttering, as occurs with excessive speed. It is interesting that this does not appear till about 4.5 seconds before impact, at which point the plane has accelerated to about 470 knots, significantly above the “maximum dive velocity”, 410 knots. As fluttering will eventually damage or destroy an aircraft, this observation may give an indication of the size of the air speed safety margin, a figure which does not appear to be available to the public.
Originally posted by ProudBird
reply to post by snowcrash911
Very kind of you to say....
Hey, people die. It's a fact of "life"....I just helped a friend go to collect his dead father, with some of my airline reward miles....OT, but what the hell??
Originally posted by snowcrash911
As for fluttering, I was quoting Legge/Stutt:
Originally posted by Reheat
Originally posted by snowcrash911
As for fluttering, I was quoting Legge/Stutt:
With apologies to ProudBird, I think that is fluttering of the tail surface, as well. That is too rapid to be be Pilot Induced Oscillations (PIO). There was an earlier period where he did get into a PIO, but not this. He simply could not move the controls rapidly enough to produce that. Fluttering due to the excessive speed is my call....
Originally posted by snowcrash911
On a different note, do you remember that Israeli pilot who landed his F-15 with one wing missing after a mid-air collision?
Originally posted by snowcrash911
On a different note, do you remember that Israeli pilot who landed his F-15 with one wing missing after a mid-air collision?
Originally posted by Kester
Spend some time studying Burnelli aircraft to learn why this was possible. Very unlikely that it could be done with the much weaker, less stable and fuel hungry tube and wing type that are in general use.
Anyone with an interest in aircraft I say again.
Study Burnelli aircraft.
This happened to a 747:
Originally posted by Alfie1
reply to post by WetBlanky
Roosevelt Roberts doesn't really make sense saying " I was in the south parking , and I was at the east loading dock." does he ? To make sense shouldn't he have said something like " I was at the east loading dock and could see a bit of south parking in the distance" ?
Originally posted by WetBlanky
Originally posted by Alfie1
reply to post by WetBlanky
Roosevelt Roberts doesn't really make sense saying " I was in the south parking , and I was at the east loading dock." does he ? To make sense shouldn't he have said something like " I was at the east loading dock and could see a bit of south parking in the distance" ?
Well not when the interviewer asks...
"Which parking lot, which dock were you at?"
Originally posted by WetBlanky
Originally posted by Alfie1
reply to post by WetBlanky
Roosevelt Roberts doesn't really make sense saying " I was in the south parking , and I was at the east loading dock." does he ? To make sense shouldn't he have said something like " I was at the east loading dock and could see a bit of south parking in the distance" ?
Well not when the interviewer asks...
"Which parking lot, which dock were you at?"
Originally posted by ANOK
reply to post by snowcrash911
An amateur pilot wouldn't know how to keep a damaged plane airborne. It would have taken all the skill a professional pilot had to bring home those damaged planes.
Originally posted by pteridine
Originally posted by ANOK
reply to post by snowcrash911
An amateur pilot wouldn't know how to keep a damaged plane airborne. It would have taken all the skill a professional pilot had to bring home those damaged planes.
The plane was damaged/fluttering not long before it struck the Pentagon so keeping it airborne may not have been the problem you perceive. I defer to the professional pilots on whether the fly-by-wire systems on the aircraft and its structural integrity would have kept it from immediately falling out of the sky.