Wash in: See Droop.
Washout: A permanent warp of an aerofoil such that the angle of attack decreases toward the wing tips.
Weight, gross: See Load, full.
Wing: The aggregate sustaining structure on the right or left side of an airplane, comprising both planes and trussing. (Thus, “detachable wings” and “folding wings.”)
Wing flap: See Aileron.
Wing loading: The weight carried per unit area of supporting surface.
Wing mast: The mast structure projecting above the wing, to which the top load wires are attached.
Wing rib: A fore-and-aft member of the wing structure used to support the covering and to give the wing section its form.
Wing spar or wing beam: A transverse member of the wing structure.
Yaw: Yawing.—Angular motion about the normal axis.