CPL Aerodynamics · Practice

The effect of extending partial (take-off) flap for take-off is:

• A.only beneficial on sealed surfaces where the reduced lift-off speed prevents soft-field bogging
• B.Reduces lift-off speed and ground roll (by increasing CLmax), at the cost of a slightly higher climb drag
• C.increases ground roll because the higher CL requires more speed to generate the necessary lift
• D.increases take-off distance because the additional drag more than offsets any lift increase