F4L1A1P3E1R1O1N1
13 points
FLAPERON is validvalid
an airfoil that functions as a flap and an aileron [n FLAPERONS]
an airfoil that functions as a flap and an aileron [n -S]
an airfoil that functions as a flap and an aileron [n FLAPERONS]
an airfoil that functions as a flap and an aileron [n -S]