Auxiliary Power Unit Aircraft Function

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 unit aircraft function. Auxiliary power units are usually found on large aircraft and naval ships as well as some large land vehicles. Apu generators provide auxiliary electrical power for running aircraft systems on the ground when the main engines aren t running and no ground electrical power is available. 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 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.

Others can produce 28 v. The technology used in the mt is derived from diesel engine turbochargers aircraft auxiliary power systems and automotive designs mts consist of a compressor combustor turbine and generator as shown in fig. How an auxiliary power unit works. 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.

Please like and subscribe. In airliners apu s are usually located at the very rear of the aircraft below the tail. Knowing this will be an explanation of auxiliary power units apu and how they are involved in the operation of an aircraft. Design of auxiliary power unit apu for co operation with turboshaft engine p 9 the section that comes below presents types of aircraft engines.

Apu is the smallest engine on airplanes. An auxiliary power unit also known as apu is a device on a vehicle that provides energy for functions other than propulsion. Pneumatic power for cabin air conditioning systems. Shaft power for other pneumatic and hydraulic systems.

Apu is necessary to start up the main engines it also powers the airplane s electronics. 2 3 6 the combustible usually gas is mixed in the combustion chamber with air.