At the rear of the machine there is a much smaller plane, which is slightly Cambered; this is the elevating plane, and it can be tilted up or down in order to raise or lower the machine.
"The Mastery of the Air"
William J. Claxton
Planes of the former type are generally fitted to racing aeroplanes, because they offer less resistance to the air than do deeply-Cambered planes.
"The Mastery of the Air"
William J. Claxton
All planes are not Cambered to the same extent: some have a very small curvature; in others the curve is greatly pronounced.
"The Mastery of the Air"
William J. Claxton