Did you know commercial jets usually have a "secret" engine hidden in the tail? 🤫 It is called the Auxiliary Power Unit (APU). This small turbine engine plays a massive role when the aircraft is parked on the ground. Since the main engines are usually turned off at the gate, the APU kicks in to generate electricity for the aircraft's systems. Most importantly, it powers the Air Conditioning (AC) to keep the cabin cool before departure. It is the unsung hero of ground operations! ❄️ 👉 Follow us
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Did you know commercial jets usually have a "secret" engine hid…
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THE "EXTRA" ENGINE OF A PLANE CALLED AN APU Did you know that there is a third engine on twin-engine aircraft or a fifth engine on a quadjet? Yes, that engine is not a jet engine like the ones you see under the wings, but it is usually hidden in the rear of an aircraft. It is also not as big as those jet engines. It is actually small and not a jet engine per se. This is what you call an APU or Auxiliary Power Unit. This is the loud sound you hear while boarding an aircraft. Also, if you look at
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APU Explained: The Plane’s Hidden Power! #apu #aircraftengineering #aviationfacts #jetengine #planeexplained | AmeWhere
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Today I will be giving you another technical video describing the APU, the third Jet-engine of the Boeing 737. We will be discussing limitations, what it is used for and what happens if you DON´T have an APU available. | MenTour Pilot
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FacebookMenTour Pilot
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
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Check out this video showcasing the Auxiliary Power Unit (APU) sta…
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FacebookAircraft Engineering
What really powers a jet on the ground? Not the big engines — but a tiny turbine hiding in the tail. The Auxiliary Power Unit (APU) jumpstarts the entire aircraft, runs the electrics, and keeps the cabin cool before takeoff. Without it? Your plane is nothing more than a 200-ton paperweight. Next time you land, look out for that little exhaust puffing away at the tail — that’s the APU doing its job. #fyp #avgeek #planespotting #pilot #aviation #APU #AircraftSystems #JetEngines #FlightSafety #Airc
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