Question:

Can any aircraft change Angle of Incidence?

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If so, what are the dynamics of it. Which one changes relative to angle of attack. is it wing chord? What's the fuselage chord called?

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  1. Chance Vought F-8U Crusader could change its angle of incidence (AOI) during carrier launches to increase lift. This was set back to 'normal' after gaining speed.

    The dynamics of the AOI are that at the time of manufacture, the wing is set at a certain angle to the datum line (a line which runs through the center of the fuselage). This is a fixed angle which cannot be changed. The AOI is dictated at the design stage of the aircraft keeping the mission profiles in view.

    When angle of attack is increased, it is the wing chord that changes relative to the airflow.

    The fuselage chord is known as the datum line.


  2. maybe

  3. I'm sure there may be others but the only aircraft I can think of that could change angle of incidence was the F8 Crusader. It lifted the wing leading edge hydraulically.

    Angle of incidence is the angle between the cord line and the longitudinal axis. Think of a line down the middle of the fuselage. Large angles of incidents are good for producing extra lift while the nose wheel is still on the ground during take off but pretty draggy going fast. So the Crusader could lower the LE after takeoff from a carrier and go like h**l.

    Oh, I hope you don't think angle of attack has anything to do with it.

  4. off course... the angle of attack must change depending on weight and airspeed.. it is changed changing the attitude of the entire airplane.

    If you mean the angle between the airfoil chord and fuselage axis usually it's solid and can not be changed. very few planes can change it, for example the US Navy fighter F-8 Crusader could because needed low speeds to land on ships( idraulic piston moved the wing as some truck  with lift-tilter) also F-111 could , it had a complex system to change the shape of the airfoil moving the rear part of the wing downward, as result the "chord"(links leading edge with trailing edge resulted increased.

    fuselage chord? you mean the fuselage length, or width, or you mean the chord of the wing at wing-root?

  5. Yes, on most airplanes the wing's angle of incidence can be changed by the pilot.  

    A wing's angle of incidence is changed when flaps are extended or retracted, when ailerons are deflected, or when the longitudinal axis is changed (as on the Concord when its nose section is moved down).

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