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33     NOMENCLATURE FOR AERONAUTICS

[[image - drawing of wing equipped with leading-edge slot, interceptor, and slotted aileron.]]
[[image - drawing of wing equipped with spoiler and Frise aileron]]
Figure 1. - Wing equipped with special control devices

[[images - drawing of two different airfoils showing the dimensions of the airfoils including: upper camber, lower camber, mean camber, chord length, mean line of the airfoil profile, aerodynamic center (quarter chord point), profile thickness]] 
Figure 2. - Dimensions of an airfoil profile