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Auxiliary power unit

Interesting facts

1:34

Explaining APU (Auxiliary Power Unit) on Airplanes

Construction

2:09

New Auxiluary Power Unit APU-120 - Aviation Equipment Holding

By drone

2:02

APU Start B787

Inside

1:57

Inside APU Of Global Express 7500 | Auxiliary Power Unit

Movie appearance

1:10

Second User Parts Movie, 350w psu - The Computer Room Nottingham

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. Aircraft APUs generally produce 115 V alternating current (AC) at 400 Hz, to run the electrical systems of the aircraft; others can produce 28 V direct current (DC). APUs can provide power through single- or three-phase systems.
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