aerofoil

The flexing or bending of an aerofoil out of its normal shape.

These outstretched wings are often called aerofoil surfaces.

This term denotes that the aerofoil has such a curved transverse section.

Gap is the vertical distance between one aerofoil and the one which is immediately above it.

The width of an aerofoil is the distance from the front to the rear edge, allowing for camber.