Auxiliary Power Unit Plane

The airborne auxiliary power is obtained from a gas turbine auxiliary power unit apu.

Auxiliary power unit plane. The aircraft apu provides power to start the main engines. How an auxiliary power unit works. The garrett gtcp gas turbine compressor air power unit electrics 85 129 was standard for the series 1 200 but when the 300 was introduced it was found that two to three times the energy was needed to start the larger cfm56 engines. It also features a dual speed sensor exhaust gas temperature sensor oil and fuel signaling filter contamination and signaling of low oil levels.

Most of the power produced is used to run an electric generator and provide pneumatic air pressure. Last week we explained how jet engines work and this week we ll talk about their little but often indispensable sibling at the back of the plane. As with everything in aviation it s primarily known by its acronym the apu. The auxiliary power unit is an actual turbine engine more appropriately called a turboshaft engine.

I m assuming you mean the actual apu in the aircraft and not the large separate model used on the ground. Through that hole is the auxiliary power unit the little engine that could. Unlike the aircraft s main engines the apu outputs almost no thrust. Auxiliary power units are usually found on large aircraft and naval ships as well as some large land vehicles.

The auxiliary power unit safir 5k g mi is designed to supply air to engine starters and environmental control systems to drive the ac generator and to supply power to hydraulic systems. Others can produce 28 v. 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. The apu is a compact self contained unit that provides compressed air for engine starting on the ground.

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. The unit provides compressed air for air conditioning while the airplane is on the ground and at limited altitude in flight. In airliners apu s are usually located at the very rear of the aircraft below the tail.