Downloaded from https://www.everyspec.com MIL-STD-1808C w/CHANGE 1 SYSTEM SUB-SYSTEM TITLE DEFINITION 72 ENGINE The subsystem components comprising the power portion of the power plant, exclusive of engine air intake, mount, cowling, scoops, cowl flaps, etc. Includes those components that: Induce and convert fuel-air mixture into power. Includes, for turbine engines, air inlet, compressor, diffuser, combustion chambers, turbine, exhaust, etc, and, for reciprocating engine, blower and clutch, clutch control valve, cylinders, cylinder baffles, intake pipes, crankshaft assembly, etc. Transmit power to the propeller shaft, if any, and accessory drives.
Includes reduction gearing, gear trains, extension shaft, and torque meter. Are used to supplement the functioning of other defined systems external to the engine, within the profile of the basic engine. Includes accessory drives, mechanical portions of the spark advance mechanism, oil transfer tubes from the propeller governor pad to the propeller shaft, etc. Control and direct the flow of lubrication through the engine from the inlet fitting to the outlet fitting. Includes engine pumps (pressure and scavenger), pressure relief valves, screens, oil lines (internal and external), etc. 81