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#21
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You need a course in basic aerodynamics. You would learn that pitch angle
and AOA are completely independent. And don't quote Aviation Consumer as an authority, many of their reviews are full of contradictions. Mike MU-2 "Renzoni Papaloni" wrote in message om... Read it the Aviation Consumer Guide you ****ing ignorant know-it-all Car Salesman. If elevator control is fine, there would be no problem and they would still build it like that, wouldn't they. I haven't seen a Saratoga with a T-tail, have you? If I look at an airplane rotating to climb or take off, the tail comes down and moves in the axis behind the wings. I never said why. I very well know that the tail generates downforce to reach equilibrium - but the issue is the tail moves down relative to the axis to climb. Period. And yes, it does it by generating even more downforce than is needed at level flight. And you don't loose total elevator control, only some authority if you get near the area, if you want the details. And the area is more than 3 ****ing degrees in bumpy air. And the plane should pitch down and it does if you approach the stall slowly. Yes it should (FAA) and does. But if you compensate and hence get into the area of extreme high attack (of the main wings), the elevator moves down even further, into the full airflow BELOW and the plane pitches up violently. Why? Because you compensate for some loss of elevator control and pull real hard. I know you shouldn't do it but people did and didn't like how it felt, ok? Your statement about 30 to 40 degrees would lead to a stall is totally wrong without connecting it to speed. I pull up a Cessna 152 to 90 degrees (vertical) if I have the airspeed and if I am crazy enough. (My instructor did). Before I run out of steam I push and avoid a stall. It's a nice ride but doesn't last long if you want to live. "CarSalesman" wrote in message ... absolute bull****.... "Renzoni Papaloni" wrote in message om... It loses elevator control in slow flight with high angles of attack, not at take off. Obviously, you've never flown one of these things. If your statement were true, it would be impossible to stall the plane. Elevator control is just fine in all phases of slow flight, landing configuration stalls, and accelerated stalls - exactly as required for FAA certification. Also exactly as any pilot is trained when checked out on a new type. Then the tail comes down and gets no air because it is in the horizontal axis right behind the main wings. Now, you're really showing your innocence. The stabilator does *not* hold the back of the airplane up, it holds it *down*. If you really lost elevator control for the reason described, the airplane would pitch down, not up. That makes the tail less effective, because the airflow it gets is partly deflected by the high angle of attack of the main wing and the airflow does not even reach the tail and is also turbulent. The use of flaps makes this even more pronounced! A straight tail in comparison would be way lower in totally undisturbed airflow and more effective in this kind of flight envelope. You better go look at one of these things on the ramp. If you were to get the nose so high, that the T-tail stabilator were totally behind the main wing, you'd have an angle of attack of about 30 to 40 degrees, which is about 3 times greater than the stall. The condition you describe is impossible. You'd be in a spin long before you reached that angle of attack. This happens when you have to ad power to fly slower, it's called getting behind the power curve. This does NOT happen when you take off. I hope you're not an active pilot. Do you really think that getting behind the power curve is limited to the tail design of the plane? You can get behind the power curve in any airplane, especially any piston airplane. You need to get some training on that phase of flight, soon. Other airplanes don't have the same problem because of their different geometry. (Longer fuselage and higher or lower t-tail.) It really has nothing to do with 'well trained pilots'. If you were well trained you would know that! Maybe you should find somebody who can draw you a picture. No offense... Better look at your own picture. With a much longer fuselage, the angle of attack required to get the T-tail down behind the main wing, is reduced. don |
#22
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I don't need anything.
"Mike Rapoport" wrote in message ink.net... You need a course in basic aerodynamics. You would learn that pitch angle and AOA are completely independent. And don't quote Aviation Consumer as an authority, many of their reviews are full of contradictions. Mike MU-2 "Renzoni Papaloni" wrote in message om... Read it the Aviation Consumer Guide you ****ing ignorant know-it-all Car Salesman. If elevator control is fine, there would be no problem and they would still build it like that, wouldn't they. I haven't seen a Saratoga with a T-tail, have you? If I look at an airplane rotating to climb or take off, the tail comes down and moves in the axis behind the wings. I never said why. I very well know that the tail generates downforce to reach equilibrium - but the issue is the tail moves down relative to the axis to climb. Period. And yes, it does it by generating even more downforce than is needed at level flight. And you don't loose total elevator control, only some authority if you get near the area, if you want the details. And the area is more than 3 ****ing degrees in bumpy air. And the plane should pitch down and it does if you approach the stall slowly. Yes it should (FAA) and does. But if you compensate and hence get into the area of extreme high attack (of the main wings), the elevator moves down even further, into the full airflow BELOW and the plane pitches up violently. Why? Because you compensate for some loss of elevator control and pull real hard. I know you shouldn't do it but people did and didn't like how it felt, ok? Your statement about 30 to 40 degrees would lead to a stall is totally wrong without connecting it to speed. I pull up a Cessna 152 to 90 degrees (vertical) if I have the airspeed and if I am crazy enough. (My instructor did). Before I run out of steam I push and avoid a stall. It's a nice ride but doesn't last long if you want to live. "CarSalesman" wrote in message ... absolute bull****.... "Renzoni Papaloni" wrote in message om... It loses elevator control in slow flight with high angles of attack, not at take off. Obviously, you've never flown one of these things. If your statement were true, it would be impossible to stall the plane. Elevator control is just fine in all phases of slow flight, landing configuration stalls, and accelerated stalls - exactly as required for FAA certification. Also exactly as any pilot is trained when checked out on a new type. Then the tail comes down and gets no air because it is in the horizontal axis right behind the main wings. Now, you're really showing your innocence. The stabilator does *not* hold the back of the airplane up, it holds it *down*. If you really lost elevator control for the reason described, the airplane would pitch down, not up. That makes the tail less effective, because the airflow it gets is partly deflected by the high angle of attack of the main wing and the airflow does not even reach the tail and is also turbulent. The use of flaps makes this even more pronounced! A straight tail in comparison would be way lower in totally undisturbed airflow and more effective in this kind of flight envelope. You better go look at one of these things on the ramp. If you were to get the nose so high, that the T-tail stabilator were totally behind the main wing, you'd have an angle of attack of about 30 to 40 degrees, which is about 3 times greater than the stall. The condition you describe is impossible. You'd be in a spin long before you reached that angle of attack. This happens when you have to ad power to fly slower, it's called getting behind the power curve. This does NOT happen when you take off. I hope you're not an active pilot. Do you really think that getting behind the power curve is limited to the tail design of the plane? You can get behind the power curve in any airplane, especially any piston airplane. You need to get some training on that phase of flight, soon. Other airplanes don't have the same problem because of their different geometry. (Longer fuselage and higher or lower t-tail.) It really has nothing to do with 'well trained pilots'. If you were well trained you would know that! Maybe you should find somebody who can draw you a picture. No offense... Better look at your own picture. With a much longer fuselage, the angle of attack required to get the T-tail down behind the main wing, is reduced. don |
#23
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Ignorance is bliss.
Mike MU-2 "Satellite" wrote in message om... I don't need anything. "Mike Rapoport" wrote in message ink.net... You need a course in basic aerodynamics. You would learn that pitch angle and AOA are completely independent. And don't quote Aviation Consumer as an authority, many of their reviews are full of contradictions. Mike MU-2 "Renzoni Papaloni" wrote in message om... Read it the Aviation Consumer Guide you ****ing ignorant know-it-all Car Salesman. If elevator control is fine, there would be no problem and they would still build it like that, wouldn't they. I haven't seen a Saratoga with a T-tail, have you? If I look at an airplane rotating to climb or take off, the tail comes down and moves in the axis behind the wings. I never said why. I very well know that the tail generates downforce to reach equilibrium - but the issue is the tail moves down relative to the axis to climb. Period. And yes, it does it by generating even more downforce than is needed at level flight. And you don't loose total elevator control, only some authority if you get near the area, if you want the details. And the area is more than 3 ****ing degrees in bumpy air. And the plane should pitch down and it does if you approach the stall slowly. Yes it should (FAA) and does. But if you compensate and hence get into the area of extreme high attack (of the main wings), the elevator moves down even further, into the full airflow BELOW and the plane pitches up violently. Why? Because you compensate for some loss of elevator control and pull real hard. I know you shouldn't do it but people did and didn't like how it felt, ok? Your statement about 30 to 40 degrees would lead to a stall is totally wrong without connecting it to speed. I pull up a Cessna 152 to 90 degrees (vertical) if I have the airspeed and if I am crazy enough. (My instructor did). Before I run out of steam I push and avoid a stall. It's a nice ride but doesn't last long if you want to live. "CarSalesman" wrote in message ... absolute bull****.... "Renzoni Papaloni" wrote in message om... It loses elevator control in slow flight with high angles of attack, not at take off. Obviously, you've never flown one of these things. If your statement were true, it would be impossible to stall the plane. Elevator control is just fine in all phases of slow flight, landing configuration stalls, and accelerated stalls - exactly as required for FAA certification. Also exactly as any pilot is trained when checked out on a new type. Then the tail comes down and gets no air because it is in the horizontal axis right behind the main wings. Now, you're really showing your innocence. The stabilator does *not* hold the back of the airplane up, it holds it *down*. If you really lost elevator control for the reason described, the airplane would pitch down, not up. That makes the tail less effective, because the airflow it gets is partly deflected by the high angle of attack of the main wing and the airflow does not even reach the tail and is also turbulent. The use of flaps makes this even more pronounced! A straight tail in comparison would be way lower in totally undisturbed airflow and more effective in this kind of flight envelope. You better go look at one of these things on the ramp. If you were to get the nose so high, that the T-tail stabilator were totally behind the main wing, you'd have an angle of attack of about 30 to 40 degrees, which is about 3 times greater than the stall. The condition you describe is impossible. You'd be in a spin long before you reached that angle of attack. This happens when you have to ad power to fly slower, it's called getting behind the power curve. This does NOT happen when you take off. I hope you're not an active pilot. Do you really think that getting behind the power curve is limited to the tail design of the plane? You can get behind the power curve in any airplane, especially any piston airplane. You need to get some training on that phase of flight, soon. Other airplanes don't have the same problem because of their different geometry. (Longer fuselage and higher or lower t-tail.) It really has nothing to do with 'well trained pilots'. If you were well trained you would know that! Maybe you should find somebody who can draw you a picture. No offense... Better look at your own picture. With a much longer fuselage, the angle of attack required to get the T-tail down behind the main wing, is reduced. don |
#24
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![]() "Mike Rapoport" wrote in message ink.net... Ignorance is bliss. But in this game it's often deadly. |
#25
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Or sometimes just downright funny. Had a Pacer land tonight and his
right main fell off on touchdown. Instant groundloop. Now that's funny. Tom S. wrote: "Mike Rapoport" wrote in message ink.net... Ignorance is bliss. But in this game it's often deadly. |
#26
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You're got a sick sense of humor :~)
"Newps" wrote in message news:iJR7b.311307$cF.95177@rwcrnsc53... Or sometimes just downright funny. Had a Pacer land tonight and his right main fell off on touchdown. Instant groundloop. Now that's funny. Tom S. wrote: "Mike Rapoport" wrote in message ink.net... Ignorance is bliss. But in this game it's often deadly. |
#27
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Aaron Coolidge wrote:
Nobody wrote: : I haven't flown one but read in the "Aviation Consumer guide" that at slow : speeds with high angle of attacks, the tail does not get enough air because : it is in the area behind the main wings. snip This is called a "deep stall", and only can happen on T-tail aircraft. You might do a Google on "Trident Staines" to find out what happens when it is taken to an extreme. A deep stall is generally considered to be unrecoverable. This phenomenon has been experienced on B-727 airplanes as well. snip My father flew the RF-101C http://www.aerofiles.com/mcdon-rf101c.jpg in the early 1960s. He refers to this phenomenon as "pitch-up". With the long chord at the wing root, and the small stabilator set up high, it was easy to reach an AOA that blanked the stabilator. If you did this, the plane pitched up and began tumbling end over end. The approved recovery procedure was to deploy the drag chute when the nose went through the highest point in the tumble or oscillation. In theory, this would stabilize the plane in a nose down attitude and you would fly out of it, sans the drag chute. If this didn't work, the backup procedure was to pull the ejection handles. One of my favorite stories dad tells is about one of the other pilots in the squadron who had to land at a French airbase because of weather at Laon AFB. When he left he was going to show those French pilots what a max performance takeoff in the Voodoo looked like. He lit both burners, rotated, got the nose gear up before increasing airspeed prevented retraction, and pulled back on the stick, apparently just a little bit too much. He found himself right at the edge of pitchup -- he wasn't tumbling, but he could not keep the pitch angle from increasing. So it kept pitching up, and up, and over, until he was inverted, at which point he regained pitch control and rolled out. The French pilots *were* impressed with his Immelman on takeoff. If you've ever wondered why the F-4 Phantom http://www.aerofiles.com/mcdon-f4bomb.jpg (the successor to the 101) had the inverted V stabilator, it was to address the pitchup problem. McDonnell offered to modify the 101s to this configuration for half a mil each, but the Air Force chose to put the money toward F-4's instead. -- David Hill david at hillREMOVETHISfamily.org Sautee-Nacoochee, GA, USA |
#28
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On Sun, 28 Sep 2003 03:04:03 GMT, David Hill
wrote: Aaron Coolidge wrote: Nobody wrote: : I haven't flown one but read in the "Aviation Consumer guide" that at slow : speeds with high angle of attacks, the tail does not get enough air because : it is in the area behind the main wings. snip This is called a "deep stall", and only can happen on T-tail aircraft. You The only aircraft to which I've seen the term "deep stall" applied with the canard, such as the Long-EZ, cozy, and others of the type. There was an article in one of the aviation mags about a year or two back on the phenomena. The pilot had removed the bottom portion of the "winglets" to test their effect. He ended up in a deep stall where the aircraft was in nearly level attitude, but he could not get the nose down. He actually got out and stood on either the canard or leading edge of the wind (I forget which now) trying to get the nose down. He said there was very little wind and he rode the thing all the way to the water. Roger Halstead (K8RI EN73 & ARRL Life Member) www.rogerhalstead.com N833R World's oldest Debonair? (S# CD-2) snip |
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