ZERO FUEL WEIGHT— The weight of the aircraft to include all useful load except fuel.

ZERO SIDESLIP—A maneuver in a twin-engine airplane with one engine inoperative that involves a small amount of bank and slightly uncoordinated flight to align the fuselage with the direction of travel and minimize drag.

ZERO THRUST (SIMULATED FEATHER)— An engine configuration with a low power setting that simulates a propeller feathered condition.