Gross Weight—The weight of the aircraft, comprising fuel, lubricating oils and the pilot.
Gyroscope—A rotating mechanism for maintaining equilibrium.
Gap—The vertical distance between the superposed wings.
H
Hangar—A shed for housing an aëroplane.
Harbor—A shelter for aircraft.
Heavier than Air—A machine weighing more than the air it displaces.
Helicopter—A flying machine in which propellers are utilized to give a lifting effect by their own direct action on the air. In aviation the term implies that the screw exerts a direct lift.
Helmsman—One in charge of the steering device.
Hydroaëroplane—An aëroplane with pontoons to enable its rising from the surface of the water. Known as hydro in model circles.