CORRECT!

9). What force makes an airplane turn?

a). The vertical component of lift.
b). The horizontal component of lift.
c). Centrifugal force.
The answer is:
b). The horizontal component of lift.

In order to turn an aircraft, the pilot manipulates the ailerons to increase lift on one wing (the down-going aileron) and decrease lift on the other wing (the up-going aileron). The wing with the increased lift rises, the other one falls and the plane banks in the direction of the lowered wing. The direction of total lift generated by the wings is thus changed.

Since some of the vertical lift at the previous pitch attitude and power setting has now been decreased, the pilot needs to change the aircraft's configuration to compensate for the amount of vertical lift lost if altitude is to be maintained. Back pressure on the elevator usually results in maintaining altitude.

back

back