Auxiliary Power Unit Aircraft

The auxiliary power unit is an actual turbine engine more appropriately called a turboshaft engine.

Auxiliary power unit aircraft.

Others can produce 28 v. Starting power for the main engines. 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.

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. An auxiliary power unit or apu allows an aircraft to operate autonomously without reliance on ground support equipment such as a ground power unit an external air conditioning unit or a high pressure air start cart. How an auxiliary power unit works. 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.

This certification guarantees to manufacturers and operators that the. 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. Pneumatic power for cabin air conditioning systems.