G
Glider—A structure similar to an aeroplane, but without motive power.
Gliding—Flying down a slope of air with a glider, or with an aeroplane in which the propelling power is cut off.
Gliding Angle—The flattest angle at which a given machine will make a perfect glide. This angle differs with different machines. The flatter the gliding angle the safer the machine.
Ground Angle—The angle of incidence of an aeroplane surface when the machine is standing on the ground.
Guy—A wire attached to a more or less distant part of the structure of any aircraft to prevent spreading. Also used to denote controlling wires which transmit the movements of the levers.
Gyroscopic Action—The resistance which a rotating wheel, or wheel-like construction, exhibits when a disturbing force tends to change its plane of rotation.