aerofoil

[ air-uh-foil ]

/ ˈɛər əˌfɔɪl /

airfoil.

Origin of aerofoil

aero- + foil²

The motion of the air over the edges of the aerofoil becomes turbulent, and the form of the stream lines suddenly changes.

The Theory and Practice of Model Aeroplaning |V. E. Johnson
When the angle of incidence increases the centre of pressure moves backwards towards the rear of the aerofoil, and vice versa.

The Theory and Practice of Model Aeroplaning |V. E. Johnson
The flexing or bending of an aerofoil out of its normal shape.

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

The stretching of the fabric on the aerofoil framework requires considerable care, especially when using silk.

The Theory and Practice of Model Aeroplaning |V. E. Johnson

aerofoil

/ (ˈɛərəʊˌfɔɪl) /

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