Question

What is reflexed camber airfoil?

(a) Camber line curves backup near the trailing edge

(b) Chord line curves backup near the trailing edge

(c) Camber and chord are at stationary

(d) Chord is at stationary

I had been asked this question in an online quiz.

My question is taken from The Cambered Airfoil topic in division Incompressible Flow over Airfoils of Aerodynamics

Answer 1

Correct choice is (a) Camber line curves backup near the trailing edge

For explanation I would say: An airfoil where the camber line curves back up near the trailing edge is called a reflexed camber airfoil. Such an airfoil is useful in certain situations, such as with tailless aircraft, because the moment about the aerodynamic center of the airfoil is zero.