Downloaded from https://www.everyspec.com MIL-STD-1808C w/CHANGE 1 SYSTEM SUB-SYSTEM TITLE DEFINITION 74 ENGINE IGNITION The subsystem components that generate, control, furnish, or distribute an electrical current to ignite the fuel-air mixture in the cylinders of reciprocating engines, or in the combustion chambers or thrust augmenters of turbine engines. Includes induction vibrators, magnetos, switches, lead filters, distributors, harnesses, spark plugs, ignition relays, exciters, and the electrical portion of the spark advance mechanism. 00 GENERAL 10 ELECTRICAL POWER SUPPLY The portion of the system that generates electrical current for the purpose of igniting the fuel-air mixture.
Includes magnetos, distributors, booster coils, exciters, transformers, storage capacitors, compositors, etc. 20 DISTRIBUTION The portion of the system that conducts high or low voltage electricity from the electrical power supply to the spark plugs or igniters. Includes wiring between magneto and distributor in those systems where they are separate units. Includes ignition harness, high tension leads, coils as used in "low tension" systems, spark plugs, igniters, etc. 30 SWITCHING The portion of the system that provides a means of rendering the electrical power supply inoperative. Includes ignition switches, wiring, connectors, etc. 85