MIL-STD-1557A, MILITARY STANDARD: DESIGNATION OF AIRCRAFT PROPULSION RECIPROCATING ENGINES (25 OCT 1983) [S/S BY MIL-STD-1812]

MIL-STD-1557A, MILITARY STANDARD: DESIGNATION OF AIRCRAFT PROPULSION RECIPROCATING ENGINES (25 OCT 1983) [S/S BY MIL-STD-1812]., This standard describes the method of assignment used by the Military Services in establishing the type and model designation of aircraft propulsion reciprocating engines.