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Originally posted by Griff
... Why don't you tell us when American Airlines started to paint their planes green and red?
This image shows the light green primer used on the primary structure components in the 757 (Boeing uses the same yellow primer and the same green primer on almost every single part of every single 757 and 767 built)
From the essay 'The Impossibility of Flying Heavy Aircraft Without Training', by Nila Sagadevan, an aeronautical engineer and pilot:
"I shan't get into the aerodynamic impossibility of flying a large commercial jetliner 20 feet above the ground at over 400 MPH. A discussion on ground effect energy, vortex compression, downwash reaction, wake turbulence, and jetblast effects are beyond the scope of this article. Let it suffice to say that it is physically impossible to fly a 200,000-lbs airliner 20 feet above the ground at 400 MPH. The author, a pilot and aeronautical engineer, challenges any pilot in the world to do so in any large high-speed aircraft that has a relatively low wing-loading (such as a commercial jet). I.e., to fly the craft at 400 MPH, 20 feet above ground in a flat trajectory over a distance of one mile. (Remember that when a plane is landing conventionally, it is traveling somewhere around 150 mph, producing SIGNIFICANTLY less wake than a plane traveling at 400 mph.)
"Furthermore, it is known that the craft impacted the Pentagon's ground floor. For purposes of reference: If a 757 were placed on the ground on its engine nacelles (I.e., gear retracted as in flight profile), its nose would be about fifteen feet above the ground! Ergo, for the aircraft to impact the ground floor of the Pentagon, Hanjour would have needed to have flown in with the engines buried in the Pentagon lawn. Some pilot. At any rate, why is such ultra-low-level flight aerodynamically impossible? Because the reactive force of the hugely powerful downwash sheet, coupled with the compressibility effects of the tip vortices, simply will not allow the aircraft to get any lower to the ground than approximately one half the distance of its wingspan - until speed is drastically reduced, which, of course, is what happens during normal landings."
In response to Sagadevan's essay, a pilot contacted the writer to report the following. And while it doesn't reference Flight 77 specifically, surely the comments apply to all flights that morning. Including AA 77:
"Regarding your comments on flight simulators, several of my colleagues and I have tried to simulate the 'hijacker's' final approach maneuvers into the towers on our company 767 simulator. We tried repeated tight, steeply banked 180 turns at 500 mph followed by a fast rollout and lineup with a tall building. More than two-thirds of those who attempted the maneuver failed to make a 'hit'. How these rookies who couldn't fly a trainer pulled this off is beyond comprehension."
Originally posted by weedwhacker
reply to post by bovarcher
Also, bovarcher, some chromate primers are a darker green....some are the lime green color, others are more of an olive green. Don't ask me why there's a difference. Could be the way different people perceive color, as well??
For the first two or three days, Marshall walked the surrounding countryside looking for airplane parts.
"I found a lot of parts," said Marshall, who was awarded a 2000 Law Enforcement Agency Directors award for identifying a man nearly four years after he was found murdered.
"The biggest part I found was one of the plane's engines. It was about 600 yards from the crash site itself. I think they took it out with a winch on a bulldozer."
While the FBI and other authorities have said the plane was mostly obliterated by the 500 mph impact, they also said a 1,000-pound piece of one of the engines was found "a considerable distance" from the crater in the wide open spaces of the Svonavec Coal Co.
Meanwhile, speculation continued to swirl around reports that a military fighter jet was seen in the vicinity immediately after the crash.
According to the Nashua (N.H.) Telegraph, FAA employees at an air-traffic control center near Boston learned from controllers at other facilities that an F-16 “stayed in hot pursuit” of the 757.
By 10:30 a.m. Tuesday, the Air Force had taken control of all U.S. airspace, the unidentified controller told the Telegraph. A few minutes later, the Boeing crashed in Stonycreek Township.
The F-16 made 360-degree turns to stay close to the 757, the Telegraph reported. “He must’ve seen the whole thing,” the FAA employee said of the F-16’s pilot.
[FBI Agent] Crowley confirmed that there were two other aircraft within 25 miles of the United flight that were heading east when it crashed, scattering debris over 8 miles.
Originally posted by weedwhacker
reply to post by GoldenFleece
Oh....and GF....as to that 'impossibility' that you just posted...I've debated this on another ATS thread....in fact, that was the actual title here on ATS!!!
Perhaps a quick search will find the old thread....
I, for one, have flown simulators under 'bridges', into 'buildings', etc, etc, etc.
Ain't that difficult!!!
Originally posted by weedwhacker
reply to post by GoldenFleece
OK, GF....we're mixing up the stories....
Thoughts?