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What is the purpose of an Auxiliary Power Unit APU electronic control unit?
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 much power does a Boeing 737 have?
Boeing does not use Rolls Royce engines on the 737. These engines are CFM International CFM56 engines. 787 – Yes, this has rolls Royce Trent 1000 engines as an option. These engines are very popular on 787’s.
How much does an APU weigh?
APU units typically weigh a few hundred pounds, and for drivers who routinely carry close to the maximum weight limits, this presents a problem when traveling into new jurisdictions where weight exemptions may differ.
How much horsepower does an APU have?
The APU uses a 6:1 pressure ratio, single-stage compressor and turbine, driving a single-stage load compressor and accessory gearbox. The 480 horsepower APU delivers compressed air to the aircraft pneumatic system and drives a customer furnished 90 kva, 24,000 rpm electrical generator.
Does APU provide hydraulic power?
The APU often provides only electic and pneumatic power, but no hydraulic power. Hydraulic power can in this case e.g. be provided from an electric motor driven pump. Secondary power is used to drive all aircraft systems (avionics and utility systems).
What is Airplane APU?
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: • Starting power for the main engines. • Pneumatic power for cabin air conditioning systems.
What is the function of the auxiliary power unit (APU)?
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: Starting power for the main engines. Pneumatic power for cabin air conditioning systems.
Where is the APU located on a plane?
APU – The little turbine engine All large commercial aircraft have an auxiliary power unit onboard, usually located in the tail of the aircraft (although some regional jets vents to the side). This is a small turbine engine, essentially the same design and operation as the main aircraft engines but on a smaller scale.
How do aircraft manufacturers determine Apu requirements?
The aircraft manufacturer determines APU requirements after considering the size of the cabin, the amount of bleed air required to power the environmental packs, and the generator size needed to power the cockpit and cabin and start an engine.
What is the difference between a jet engine and Apu?
However, unlike the main engines, the APU does not provide thrust (hence it would be wrong to call it a jet engine). Instead, it powers an electric generator and provides air pressure. A Honeywell APU (it produces APUs for all Boeing 737 and Airbus A320 aircraft).
https://www.youtube.com/watch?v=jn0nqQLbAS4