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Letters of authorization from the F.A.A. question?

I read in the Smithsonian publication that a few people n rare occasions were issued letters of authorization to fly any piston powered , propeller driven aircraft ever built. Does anyone know anything about this?

Chapter 32 has changed, but what you're talking about was that if you had 3 LOAs (say Mustangs, Corsairs and P-40s) you could be granted an unlimited LOA to fly an piston warbirds over 800 horsepower.

Now they issue type ratings. And if the aircraft is not expiramental, you don't need anything anyway. (so, you could fly a Limited Category Mustang, but not an expiramental one with no ratings or LOAs, and a T-28A model with 600 horsepower doesn't require an LOA because it is under 800, but you get a letter that says you don't need a letter -- "I'm from the FAA and I'm here to help.")

Rare $12.49 Rare

Aircraft Collision Avoidance Systems $66.91 High Quality Content by WIKIPEDIA articles Modern aircraft can use several types of collision avoidance systems to prevent unintentional contact with other aircraft, obstacles, or the ground: Airborne Radar can detect the relative location of other aircraft, and has been in military use since World War II, when it was introduced to help night fighters locate bombers. While larger civil aircraft carry weather radar, sensitive anticollision radar is rare in nonmilitary aircraft. A Traffic alert and Collision Avoidance System, which actively interrogates the transponders of other aircraft and negotiates collisionavoidance tactics with them in case of a threat. Author: Miller, Frederic P./ Vandome, Agnes F./ McBrewster, John Binding Type: Paperback Number of Pages: 80 Publication Date: 2010/06/23 Language: English Dimensions: 5.98 x 9.01 x 0.19 inches

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Luftwaffe Aerial Torpedo Aircraft and Operations $34.41 This fascinating book offers a rare account into the operations of the Luftwaffes aerial torpedo units during World War II. Often overlooked, the crews who flew in these units were highly trained and experienced and their missions involved hazardous flying against difficult and welldefended maritime targets.Harold Thiele has researched this field for many years. Before providing a detailed diary of Luftwaffe torpedo operations, he explores the origins of the aerial torpedo and offers a comparative study of its development in Germany, Britain, the USA, Italy and Japan from World War I until the outbreak of World War II. The body of the book comprises a detailed chronological diary of operations mounted off the English coast, in the Atlantic, the Mediterranean, off North Africa and in the Black Sea by the Ju 88s, He 111s, He 177s, and Ar 95s (etc.) of Luftwaffes torpedo units, such as KG 26, KG 77 and the various floatplaneequipped Staffeln which also undertook such operations. Supplemented by color artwork, target listings, aircraft and torpedo types, units and all ships known to have been sunk or damaged by aerial torpedo attack, this work will ber an indispensable reference for modelers researchers. Author: Thiele, Harold Binding Type: Paperback Number of Pages: 96 Publication Date: 2005/08/01 Language: English Dimensions: 11.60 x 8.20 x 0.30 inches

Cvn68 Nimitz, U.S. Navy Aircraft Carrier $31.67 A unique and valuable keepsake with beautifully printed color images of CVN68, U.S.S. Nimitz, a capsule biography, and rare color photographs of the great man himself. A terrific book for anyone who likes the Navy, aircraft carriers, military history, or World War II. Author: Zimmerman, W. Frederick Binding Type: Paperback Number of Pages: 32 Publication Date: 2008/01/01 Language: English Dimensions: 8.50 x 8.50 x 0.08 inches

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Why is every student pilot taught that an aircraft stalls at a critical angle of attack??

isnt it true that a stall is not just a result of the critical angle being exceeded,but is completely dependant on the thrust produced by aircraft in flight?If the airspeed is less that the stalling speed,the aicraft stalls but just because of no lift which is a result of inadequate thrust,while for a fighter jet,stalling is rare.

It seems that way but, in fact, it all comes down to angle of attack. The faster you're going, the better the wing functions. When a plane is level and you drop below a certain speed, the force of gravity overcomes the weakened lifting force of the wings. As this happens, the plane begins to drop. This downward motion increases the wing's angle of attack until the wing stalls. In fighters, this happens just the same, but is easier to aviod because it's easier to keep your speed up with so much power. Basically, the decreased lift at low speeds lets the wings fall into a stall. It's a different circumstance than pulling the nose up too hard, but the same thing happens to the wing.

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