APU Explained: The Plane’s Hidden Power! #apu #aircraftengineering #aviationfacts #jetengine #planeexplained | AmeWhere

How to start Auxiliary Power Unit (APU) #mechanic #aviation #aircraft | Aerocraft Mech

Starting the APU from batteries on the 757! The APU on some aircraft has its own battery which is only ever used to start the unit. The 757 is one of these aircraft. The battery is located in the rear cargo bay. . . RePosted• @the_jet_mechanic . . #AviationPhotografy #aviationislife #aviationpost #aviationshop #aviationstudent #aviationmanagement #aviationsydney #aviation1903 #aviation35 #aviation4you #aviationartist #aviationaustralia #aviationworldlover #aviationstore #AviationEnthusiasts #avi

Check out this video showcasing the Auxiliary Power Unit (APU) starting up on an aircraft. Notice the smoke coming out from the APU exhaust? What’s Happening? I think , It’s primarily due to the combustion process as the APU powers up, especially if the unit hasn't been used recently. Importance of APU ! - Provides electrical power and air conditioning while the aircraft is on the ground. - Supplies bleed air to start the main engines. - Enhances passenger comfort and operational efficiency. APU