Auxiliary Power Unit
Others can produce 28 v.
Auxiliary power unit. 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. Auxiliary power units are usually found on large aircraft and naval ships as well as some large land vehicles. An auxiliary power unit also known as apu is a device on a vehicle that provides energy for functions other than propulsion. Shaft power for other pneumatic and hydraulic systems.
A clean reliable all electric auxiliary power unit apu that not only saves fuel but delivers unmatched driver comfort previously unavailable in an electric unit. 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. How an auxiliary power unit works. Starting power for the main engines.