Wire, Side Bracing—A bracing wire crossing diagonally a side bay of fuselage, tail boom bay, undercarriage side bay or centre-section side bay. This term is not usually used with reference to incidence wires, although they cross diagonally the side bays of the cell. It should be stated whether right- or left-hand.
Wire, Cross Bracing—A bracing wire, the position of which is diagonal from right to left when viewing it from the front of an aeroplane.
Wire, Control Bracing—A wire preventing distortion of a controlling surface.
Wire, Control—A wire connecting a controlling surface with the pilot's control lever, wheel, or rudder-bar.
Wire, Aileron Gap—A wire connecting top and bottom ailerons.
Wire, Aileron Balance—A wire connecting the right- and left-hand top ailerons. Sometimes termed the “aileron compensating wire.”
Wire, Snaking—A wire, usually of soft metal, wound spirally or tied round another wire, and attached at each end to the framework. Used to prevent the wire round which it is “snaked” from becoming, in the event of its displacement, entangled with the propeller.
Wire, Locking—A wire used to prevent a turnbuckle barrel or other fitting from losing its adjustment.
Wing—Strictly speaking, a wing is one of the surfaces of an ornithopter. The term is, however, often applied to the lifting surface of an aeroplane when such surface is divided into two parts, one being the left-hand “wing,” and the other the right-hand “wing.”
Wind-Tunnel—A large tube used for experimenting with surfaces and models, and through which a current of air is made to flow by artificial means.