Auxiliary Power Unit Aircraft

How an auxiliary power unit works.

Auxiliary power unit aircraft.

The auxiliary power unit is an actual turbine engine more appropriately called a turboshaft engine. The safír 5k g mis auxiliary power unit is designed to supply air for starting the main engines for use in air conditioning systems and to drive the dc starter generator. An auxiliary power unit apu is a device on a vehicle that provides energy for functions other than propulsion they are commonly found on large aircraft and naval ships as well as some large land vehicles. Unlike the aircraft s main engines the apu outputs almost no thrust.

Shaft power for other pneumatic and hydraulic systems. Most of the power produced is used to run an electric generator and provide pneumatic air pressure. The auxiliary power unit apu is a small gas turbine engine mounted in the tail cone of an aircraft to provide autonomous electrical and mechanical power for the following. With more than 95 000 apus produced and more than 36 000 in service today honeywell has a large apu installed base and is poised for further growth.

Aircraft apus generally produce 115 v alternating current ac at 400 hz rather than 50 60 hz in mains supply to run the electrical systems of the aircraft. Others can produce 28 v. Starting power for the main engines. This certification guarantees to manufacturers and operators that the.