- G -

G - Acceleration force unit (1G = Earth Gravity).

Glider - A heavier-than-air aircraft, that is supported in flight by the dynamic reaction of the air against its lifting surfaces and whose free flight does not depend principally on an engine.

GROSS WEIGHT - The total weight of an aircraft when fully loaded.

GROUND EFFECT - Increased lift generated by the interaction between a lift system and the ground.

GROUND SPEED - The actual speed that an aircraft travels over the ground.

GROUND TRACK ANGLE (GTA) - Direction of ground speed vector with respect to true north.

GROUND VISIBILITY - prevailing horizontal visibility near the earth`s surface as reported by the United States National Weather Service or an accredited observer.

GYRODYNE - A rotorcraft whose rotors are normally engine-driven for takeoff, hovering, and landing, and for forward flight through part of its speed range, and whose means of propulsion, consisting usually of conventional propellers, is independent of the rotor system.

GYROPLANE - A rotorcraft whose rotors are not engine-driven, except for initial starting, but are made to rotate by action of the air when the rotorcraft is moving; and whose means of propulsion, consisting usually of conventional propellers, is independent of the rotor system.