aerofoil

The flexing or bending of an aerofoil out of its normal shape.
The Theory and Practice of Model Aeroplaning|V. E. Johnson
These outstretched wings are often called aerofoil surfaces.
The Theory and Practice of Model Aeroplaning|V. E. Johnson
This term denotes that the aerofoil has such a curved transverse section.
The Theory and Practice of Model Aeroplaning|V. E. Johnson
Gap is the vertical distance between one aerofoil and the one which is immediately above it.
The Theory and Practice of Model Aeroplaning|V. E. Johnson

The width of an aerofoil is the distance from the front to the rear edge, allowing for camber.
The Theory and Practice of Model Aeroplaning|V. E. Johnson

British Dictionary definitions for aerofoil

aerofoil

US and Canadian airfoil (ˈɛəˌfɔɪl)

/ (ˈɛərəʊˌfɔɪl) /

noun

a cross section of an aileron, wing, tailplane, or rotor blade

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