The Jet Engine's Brain & Body: How a Jet Engine Controls Its Fuel

Push the thrust lever and a jet engine doesn't just "add fuel". A control system balances air and fuel in a narrow window, too lean and the flame goes out, too rich and it overheats, while protecting the engine every second. Here's the brain and the body behind it, all in handmade cardboard. What you'll learn: • The combustion balance: the air–fuel ratio and its lean and rich limits • From mechanical fuel control to the FADEC, with two independent channels • Why the fuel also cools the oil (the fuel/oil heat exchanger) • The pump, the filters and the bypass valve • Fuel nozzles, the combustion chamber, and the air that keeps the flame tube from melting • The flow divider and duplex nozzles • The drain valve Chapters: 0:00 The thrust lever 0:24 The combustion balance 1:06 From mechanical to digital 2:24 The FADEC: two channels 3:42 Fuel cools the oil 4:18 Pump, filters and bypass 5:30 Nozzles and the combustion chamber 6:12 The flow divider 6:42 The drain valve 7:18 Wrap-up What part of a jet engine should I explain next? 👇 This video is for educational purposes only. Not a maintenance, operating or training manual. #aviation #jetengine #engineering #avgeek #stem