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Originally posted by turbofan
Pilots including those who actually flew in the alleged UA175, and UA93
talk about "Control" of aircraft over max operating limits.
vimeo.com...
Dutch roll
Dutch roll is a type of aircraft motion, consisting of an out-of-phase combination of "tail-wagging" and rocking from side to side. This yaw-roll coupling is one of the basic flight dynamic modes (others include phugoid, short period, and spiral divergence). This motion is normally well damped in most light aircraft, though some aircraft with well-damped Dutch roll modes can experience a degradation in damping as airspeed and altitude increase. Dutch roll stability can be artificially increased by the installation of a yaw-damper. Wings placed well above the center of mass and dihedral both tend to increase the roll restoring force, and therefore the Dutch roll tendencies; this is why high-winged aircraft often have slight anhedral.
The Dutch roll mode can be excited by any use of aileron or rudder, but for flight test purposes it is usually excited with a rudder singlet (short, sharp motions of the rudder to a specified angle, and then back to the centered position) or doublet (a pair of such motions in opposite directions). Some larger aircraft are better excited with aileron inputs. Periods can range from a few seconds for light aircraft to a minute or more for airliners.
The name comes from the movement that (Dutch) skaters make when skating on ice.
Dutch roll is also the name (considered by professionals to be a misnomer) given to a coordination maneuver generally taught to student pilots to help them improve their "stick-and-rudder" technique. The aircraft is alternately rolled as much as 60-degrees left and right while rudder is applied to keep the nose of the aircraft pointed at a fixed point. This coordination technique is better referred to as "rolling on a heading", where the aircraft is rolled in such a way as to maintain an accurate heading without the nose moving from side-to-side (or yawing). The Yaw motion is induced through the use of ailerons alone due to aileron drag where the lifting wing (aileron down) is doing more work than the descending wing (aileron up) and therefore creates more drag, forcing the lifting wing back, yawing the aircraft toward it. This has to be countered precisely by application of rudder in the same direction as the aileron control (left stick, left rudder - right stick, right rudder). This is known as synchronised controls when done properly, and is difficult to learn and apply well. As each aircraft is different, learning the correct amount of rudder to apply with aileron is different for each aircraft. It has nothing to do with sideslip, which is what results when it all goes wrong.
Origin
Originally posted by turbofan
Have a listen to the link below. This is Ralph Kolstad who also contributed to the
latest P4T presentation.
Ralph has 23,000 hours flight time, 27 years in the airlines, B757/767 for 13 years mostly as international captain, 20 years US Navy flying fighters off aircraft carriers, participated in TopGun twice, is also a civilian pilot flying gliders, light airplanes and warbirds.
noliesradio.org...
Official Trailer of latest Pilots for 911 Truth Presentation
www.youtube.com...
Originally posted by hooper
Does it bother you in the least that of the millions of pilots out there, just these handful THINK it is impossible.
Originally posted by hooper
Does it bother you in the least that of the 'millions' of pilots out there, just these handful THINK it is impossible. Just something to think about. If it really was as obvious as these folks say then I would think you would have heard from more than what - a half dozen self proclaimed "experts"?
312,000 Active General Aviation Aircraft
17,770 Passenger Aircraft
89,129 Military Aircraft
26,500 Civil Helicopters
29,700 Military Helicopters.
According to the General Aviation Manufacturers Association there are
approximately 312,000 active general aviation aircraft worldwide.
Origin
Originally posted by HennyPen
Perhaps you have large databases of pilots and architects and government officials and military officers and other professionals who publicly support the 911 officail storyline?
Originally posted by OmegaPoint
reply to post by HennyPen
The Impossibility of Flying Heavy Aircraft Without Training
by Nila Sagadevan
Aeronautical engineer and pilot
According to FAA radar controllers, “Flight 77” then suddenly pops up over Washington DC and executes an incredibly precise diving turn at a rate of 360 degrees/minute while descending at 3,500 ft/min, at the end of which “Hanjour” allegedly levels out at ground level. Oh, I almost forgot: He also had the presence of mind to turn off the transponder in the middle of this incredibly difficult maneuver (one of his instructors later commented the hapless fellow couldn’t have spelt the word if his life depended on it).
The maneuver was in fact so precisely executed that the air traffic controllers at Dulles refused to believe the blip on their screen was a commercial airliner. Danielle O’Brian, one of the air traffic controllers at Dulles who reported seeing the aircraft at 9:25 said, “The speed, the maneuverability, the way that he turned, we all thought in the radar room, all of us experienced air traffic controllers, that that was a military plane.”
Origin
Dutch roll
Dutch roll is a type of aircraft motion, consisting of an out-of-phase combination of "tail-wagging" and rocking from side to side. This yaw-roll coupling is one of the basic flight dynamic modes (others include phugoid, short period, and spiral divergence). This motion is normally well damped in most light aircraft, though some aircraft with well-damped Dutch roll modes can experience a degradation in damping as airspeed and altitude increase. Dutch roll stability can be artificially increased by the installation of a yaw-damper. Wings placed well above the center of mass and dihedral both tend to increase the roll restoring force, and therefore the Dutch roll tendencies; this is why high-winged aircraft often have slight anhedral.
The Dutch roll mode can be excited by any use of aileron or rudder, but for flight test purposes it is usually excited with a rudder singlet (short, sharp motions of the rudder to a specified angle, and then back to the centered position) or doublet (a pair of such motions in opposite directions). Some larger aircraft are better excited with aileron inputs. Periods can range from a few seconds for light aircraft to a minute or more for airliners.
The name comes from the movement that (Dutch) skaters make when skating on ice.
Dutch roll is also the name (considered by professionals to be a misnomer) given to a coordination maneuver generally taught to student pilots to help them improve their "stick-and-rudder" technique. The aircraft is alternately rolled as much as 60-degrees left and right while rudder is applied to keep the nose of the aircraft pointed at a fixed point. This coordination technique is better referred to as "rolling on a heading", where the aircraft is rolled in such a way as to maintain an accurate heading without the nose moving from side-to-side (or yawing). The Yaw motion is induced through the use of ailerons alone due to aileron drag where the lifting wing (aileron down) is doing more work than the descending wing (aileron up) and therefore creates more drag, forcing the lifting wing back, yawing the aircraft toward it. This has to be countered precisely by application of rudder in the same direction as the aileron control (left stick, left rudder - right stick, right rudder). This is known as synchronised controls when done properly, and is difficult to learn and apply well. As each aircraft is different, learning the correct amount of rudder to apply with aileron is different for each aircraft. It has nothing to do with sideslip, which is what results when it all goes wrong.
Origin
I always thought that inexperienced Cessna pilots would have had extreme difficulty with keeping the much larger 757s / 767s from rocking back and forth (dutch rolling). Just imagine trying to hit the 210 foot wide towers with the aircraft rocking back and forth. It must have been experienced remote control pilots or some kind of homing beacons.
Russ Wintenburg, another pilot on record, who flew the ACTUAL plane alleged to have hit the south tower, has indicated that he could not have controlled it at that speed and altitude. According to him, if I'm not mistaken by my memory of his testimony (I'm not a pilot) the controls actually stiffen and become unresponsive..
Also, 600 knots indicated at 20,000 feet would be more stressful than 600 knots indicated at sea level, mostly because 600 knots at 20,000 feet would mean a higher mach number, but the same dynamic pressure.
Originally posted by tezzajw
A real pilot with a real name and a real career talking about the alleged speeds of the planes.
Very interesting to listen to. Thanks for the link, turbo.
weedwhacker, when you eventually show up, you can study this so when you have your chat with Ralph, you can discuss all of the points with him. You did contact Ralph, right?
You should have a chat with a certain self-proclaimed pilot on this forum
who doesn't get this fact.