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Originally posted by ANOK
reply to post by intrptr
That vid proves nothing. A plane going 500mph would damage it's landing gear if it was down.
Maximum Gear Operating/Extended 270 kts / .82 mach
biggles-software.com...
it would not have been moving faster than 310mph, I would guess it was doing around 250mph.
Brian also consulted with a pair of commercial airline pilots who decided to try this kind of approach in a flight training simulator. Although the pilots were not sure the simulator models such scenarios with complete accuracy, they reported no significant difficulties in flying a 757 within an altitude of tens of feet at speeds between 350 and 550 mph (565 to 885 km/h) across smooth terrain. The only issue they encountered was constant warnings from the simulator about flying too fast and too low. These warnings were expected since the manufacturer does not recommend and FAA regulations prohibit flying a commercial aircraft the way Flight 77 was flown. These restrictions do not mean it is impossible for a plane to fly at those conditions but that it is extremely hazardous to do so, and safety was obviously not a concern to the terrorists on September 11. An aircraft flying at those high speeds at low altitude would also likely experience shaking due to the loads acting on it, but commercial aircraft are designed with at least a 50% safety margin to survive such extremes.
One of the pilots summarized his experiences by stating, "This whole ground effect argument is ridiculous. People need to realize that crashing a plane into a building as massive as the Pentagon is remarkably easy and takes no skill at all. Landing one on a runway safely even under the best conditions? Now that's the hard part!" While he may have been exaggerating a bit for effect, he does raise a valid point that flying skillfully and safely is much more difficult than flying as recklessly as the terrorists did on September 11.
- answer by Jeff Scott, 21 May 2006
First, it should be easy enough, if there is a legitimate need, to source a Boeing V-G diagram. The fact that the "need" is based on a whacko 9-11 conspiracy theory probably takes going to Boeing out of the picture.
Second, while you can graph a few V speeds onto a generic V-G diagram and make it work for students, but hardly good enough for engineering data. There are lots more to a V-G diagram than those 3 speeds.
Last, an airplane does not suddenly come apart at the right side of the diagram, as any number of LOC events have shown in numerous types. There are a number of other factors to the right side-bird strike protection, flight control characteristics (aileron reversal, hydraulic control limits, wing bending) and flight test design. None of which was a concern to hijackers. I have no doubt a B757-767 could exceed the right side and maintain integrity for the short while they needed it.
Conspiracy things belong in other forums. I think that this thread has passed its use-by date, perhaps.
I was the captain of that particular shot, filmed during a Squadron open-day a couple of years ago. It's part of a routine that has been performed over thirty times at various airshows and practices around the world including RIAT Fairford 2003, Kemble 2006, RAF Waddington 2006, Warbirds Over Wanaka 2004, Avalon 2005.
The low pass is flown into wind at 350 knots (indicated) and 100 feet above the runway. It's a 2g pull up to between 45 and 55 degrees nose up pitch (although there has been higher) and the zoom climb ends at an altitude between 8000 and 10000 feet depending on the type of pull up used. The sequence does not end with a loop as some of the readers speculate, but in fact with a 60 degree wingover at around 220 knots. It is easily possible to enhance this maneouver with a steeper climb and bank but there is no need - it is spectacular already, and safe.
Originally posted by snowcrash911
Originally posted by GoodOlDave
Yeah, that story sounds like yet another "something that someone heard that someone else heard" that changed a simple story into something outlandish after so many iterations. It's almost certainly based upon a real eyewitness account (the mention of the sunroof makes it sound vaguely like Penny Elgas' eyewitness testimony) but by the time it got to yoru chaperone it became a whole different story.
You got it right GoodOlDave, it's probably a bastardized version of Penny Elgas. She did actually touch piece of the plane: a piece that fell off. She later donated it to a museum.
If the guard really said Penny touched the plane in the air, he's an idiot. But how can we be sure the guard's story wasn't distorted?
Originally posted by pshea38
Peggy: Can I have this?
Investigator: No. It is important evidence!
Peggy: But I touched it!
Investigator: oh, well take it away so!
Peggy: Nice! I will treasure this forever.
Hey! Wait a minute! This piece looks like a prop!
Investigator: That's all we got Lady! Take it or leave it!
Peggy: I'll take it. I can alwaysselldonate it to some museum or other.
Originally posted by intrptr
reply to post by smyleegrl
Rather than speculate wether or not touching the bottom of a plane in flight is possible, I thought I would bring something that gives a better feel for the dynamics involved.
Forward to :25 seconds in here:
edit on 15-2-2012 by intrptr because: link problem
Originally posted by smurfy
Originally posted by intrptr
reply to post by smyleegrl
Rather than speculate wether or not touching the bottom of a plane in flight is possible, I thought I would bring something that gives a better feel for the dynamics involved.
I thought all the Pentagon 'planes were Boeings?
Originally posted by snowcrash911
Originally posted by pshea38
Peggy: Can I have this?
Investigator: No. It is important evidence!
Peggy: But I touched it!
Investigator: oh, well take it away so!
Peggy: Nice! I will treasure this forever.
Hey! Wait a minute! This piece looks like a prop!
Investigator: That's all we got Lady! Take it or leave it!
Peggy: I'll take it. I can alwaysselldonate it to some museum or other.
First of all, her name is Penny, and she's an older lady.
Second of all, she was traumatized by the events of that day, and while she was making room for another crying, traumatized lady to sit in her car, she was throwing things from her front seat into her trunk, including a piece of the wing that landed near her car, which she picked up thinking it was one of her possessions.
There was no "investigator" involved at that moment. It was pure chaos.
But I'm sure your delusions will hold you hostage forever, thinking Penny Elgas is an evil "NWO agent" who is out to destroy your life.
Penny saw the plane approach and hit the building. Tough luck and perpetual fail for no planers, who can't even muster the respect to spell the names of the 9/11 victims they're defaming correctly.
Originally posted by snowcrash911
Originally posted by smurfy
Originally posted by intrptr
reply to post by smyleegrl
Rather than speculate wether or not touching the bottom of a plane in flight is possible, I thought I would bring something that gives a better feel for the dynamics involved.
I thought all the Pentagon 'planes were Boeings?
You're welcome.
Originally posted by snowcrash911
This is the plane piece Penny Elgas donated to the museum:
Originally posted by pshea38
Now where are those titanium landing gear components that can survive temperatures
of 3000 degrees?
Originally posted by snowcrash911
reply to post by pshea38
Congratulations, that could be the most asinine post I've read on ATS ever. If not, very close.
The plane part Penny found was dislodged by the plane impacting a pole (either a light pole or the VDOT pole) on the way to the Pentagon.
That said, plane parts impacting the Pentagon which were flung sideways and backwards weren't all scorched, that part of accident physics exists only in your mind.
Originally posted by snowcrash911
Originally posted by pshea38
Now where are those titanium landing gear components that can survive temperatures
of 3000 degrees?
Fires never reach 3000 degrees, gas temperature does not mean material temperature, so the titanium doesn't melt, and landing gear components were indeed found.
Anything else?