Auxiliary power unit - Wikipedia
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.
What is the exhaust port on the tail of jetliners for?
It uses jet fuel to make electricity to power the screen on the back of the seat or the cabin lights. It can also be referred as a tailcone. That's the exhaust port for the APU (Auxillary Power Unit). The APU is usually used to power on-board electronics when at …
What Is an APU Exhaust and Why Do Airplanes Have Them?
2024年8月26日 · APU Exhaust. The small hole in the back of an airplane’s tail assembly is an Auxillary Power Unit (APU) exhaust. Most modern airplanes use a small gas-powered engine for electrical and mechanical power. Known as an APU, it eliminates the need for ground power. Airplanes can run their APU to generate electrical and mechanical power.
The 737 APU - The Boeing 737 Technical Site
The 737 NG APU is recognisable by the “eductor” cooling air inlet above the exhaust. This and a redesigned silencer make the NG APU 12dB quieter than the Classics. The eductor works by using the high speed flow of the APU exhaust which forms a low pressure area.
Auxiliary Power Unit – APU Explained - WingTalkers
The shaft turns the generator to create electric power via a gear box. Air for the engine enters through a screened inlet door via the fuselage (skin) under the tail and the exhaust from the engine is ported out an exhaust in the tail. The inlet door is closed when the APU is not in use.
What's the Hole in Your Plane's Tail? It's the Little Engine That Could ...
2019年3月11日 · The APU is a turbine engine that sits in the tail of the aircraft. It provides no thrust. Like any jet engine, it takes in air, compresses it, adds a fuel mixture and ignites it. Once started, the APU powers both an electrical generator and an air compressor, Plumb explained. The generator powers cabin lights and flight-deck avionics.
BOEING B737: AUXILLARY POWER UNIT (APU) - Blogger
2013年6月25日 · The eductor works by using the high speed flow of the APU exhaust which forms a low pressure area. The low pressure pulls outside air through the eductor inlet duct to the APU compartment. The cooling air then goes through the oil cooler and out the APU exhaust duct below, eliminating the need for a separate cooling air vent or fan.
What is the tail exhaust port on a boeing 747?
Whenever I'm at the airport and I see the 747s lined up for boarding, there is often a very hot looking exhaust coming from a port at the very rear of the tail. What is this? is there a conventional generator in the tail? or is it an additional turbine? does it operate during flight, or …
THe Hole At The Back Of The Plane - Airliners.net
2001年2月9日 · The hole in the tails of 737, 757, and 767 airplanes is the auxiliary power unit (APU) exhaust. On the 727, it is in the right wing. On the 777, it is on the left side of the tail. On the DC-9/MD80, it is on the right side of the tail just over the engine.
Airbus APU Vents? - Airliners.net
2007年1月27日 · When I have started up APUs in the morning and switch the bleeds to heat or cool the cabin, the excess air vents out between the main gears. The avionics exhaust is the oval port on the right side just above the nose gear. And the APU exhaust is out the tail. I don't have a typerating for the A320 (yet), but I also have to agree with Trent900.