Downloaded from https://www.everyspec.com MIL-STD-1808C w/CHANGE 1 SYSTEM SUB-SYSTEM TITLE DEFINITION 86 LIFT SYSTEM Those units and components, which together with the primary propulsion system furnish vectorable vertical thrust allowing the aircraft to achieve Short Take-Off and Vertical Landing (STOVL). Also includes those units and components which provide the means for stabilizing the aircraft when in the STOVL mode. 00 GENERAL 10 FAN That portion of the system that provides lift for the aircraft when operating in a STOVL flight condition. This includes gearboxes, clutches and accessories.
20 DRIVE SHAFT That portion of the system that provides a means of transmitting power from the engine to the STOVL lift system. 30 VARIABLE AREA NOZZLE That part of the system that controls and ducts STOVL Fan outlet air to provide aircraft STOVL lift. 40 ROLL CONTROL That portion of the system that ducts and controls main engine generated air for the control of aircraft roll attitude when in a STOVL flight configuration. 97