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It seems to me that the crux of the misunderstanding in your question is here: If I then add power and climb (while holding the same attitude) If you hold the elevator in a fixed position and add power, the airplane will pitch up relative to the ground, to the extent needed to preserve the original angle of attack relative to the airplane's motion through ...


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Wolfgang Langewiesche is right to appropriate order of approximation. For every elevator position a statically stable airplane settles to a specific equilibrium angle of attack. That's how static stability works. Airplane is statically stable if and only if increasing angle of attack causes higher increase in coefficient of lift on the aft airfoil (tail for ...


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There is a contradiction built into the question. You write: Consider a certain elevator position for straight and level flight at cruise rpm. If I then add power and climb (while holding the same attitude) isn't it true the Angle of Attack will increase because the relative wind is now coming from in front and above the plane? If this is true, then how ...


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For a given airspeed, there is exactly one distinct angle of attack possible resulting in straight stabilized flight. If it would be higher or lower in any moment, there is excessive or insufficient lift and forces are no longer in balance. It gets "adjusted" thanks to airplane designed longitudinal stability by either readjusting change in pitch, ...


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If you add power while holding the same attitude you will accelerate. As you accelerate you will have to hold the nose down and trim, (gradually changing your attitude) but this will actually decrease rather than increase the AOA. Unless you want to climb. If you add power and pitch up to hold the same airspeed, you will climb at the same AOA and airspeed ...


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Your understanding of AoA is correct. While the elevators do influence AoA they don’t control it, so you’re right that a particular elevator position doesn’t correspond to a particular AoA. You example is flawed though - if you increase power to climb then your AoA might not change at all, or not significantly.


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