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Air Engines
Air Engines
Air Engines
Air Engines
Air Engines
Air Engines
Air Engines
Air Engines
Air Engines
Air Engines
Air Engines
Air Engines
Air Engines
Air Engines
Air Engines
Air Engines
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Air Engines


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  • 1. Air Engines CUO Tonya Brown Apr 11 Flying Camp: Basic/Proficiency/Advanced
  • 2. Aim
    • State the basic principles of operation and identify the basic components of:
      • A four stroke cycle internal combustion engine
      • Basic turbo jet engine
    • Demonstration of a type of thrust similar to that of engines found in jet aircraft
  • 3. Four Stroke Piston Aircraft Engine
    • This has a cycle of four operations:
    • 1. Induction
    • 2. Compression
    • 3. Expansion (or Ignition)
    • 4. Exhaust
  • 4. Induction
    • Inlet valve opens
    • Down stroke, to allow mixture of fuel and air into cylinder chamber
  • 5. Compression
    • Compression
    • Both valves remain closed
    • Rising piston compresses mixture
  • 6. Power/Ignition
    • Piston reaches end of compression
    • Inlet and Exhaust valves both closed
    • Mixture ignited by an electrical spark
    • The heat generated rapidly expands mixture
    • Forcing the piston down, thus turning the crankshaft
  • 7. Exhaust
    • At the beginning of final up stroke
    • Exhaust valve opened (Inlet valve remains closed)
    • Burnt gases released into atmosphere
    • Complete sweeping of cylinder by piston during upward travel cleans for next cycle
  • 8. The Jet Engine
    • Sequence of induction, compression, expansion and exhaust can be applied to turbo jet engine
    • All of these processes occur continuously in engine and delivery is uninterrupted (unlike a piston engine)
  • 9.
    • Turbojet engine has no reciprocating parts
    • Therefore mechanically smoother and parts are less stressed than a piston engine
    • Figure shows general make-up of basic gas turbine engine
  • 10.
    • Incoming air is squeezed through the front fan (compressor) into the compression chamber
    • Add the fuel and ignited
    • Gases expand and flow out the rear of the engine
  • 11.
    • To maintain the movement of the compressor another fan (rear turbine) is located at the rear. Connected to the compressor by a shaft
    • Fan turned by hot gases passing through at very high velocity
    • After passing through turbine, the heated gases, still expanding, leave from exhaust nozzle as a jet
  • 12. Afterburning (Reheat)
    • Used for obtaining additional power
    • Feeding fuel into hot gases at back of engine
    • Heats the gases even more
    • Fuel ignited as soon as it comes in contact w/ hot gases
    • Increased expansion of air which was originally drawn from front gives aircraft extra thrust
  • 13. Use of Afterburning
    • Uses very large amount of fuel
    • Usually used to:
      • Shorten take-off
      • Increase rate of climb
      • Give extra speed for a short period of time
  • 14. Like this...
  • 15. No, obviously like this...
  • 16. Model Air Engine
    • Imagine that...
      • Straw = Fuselage
      • Balloon = Aircraft Engine
    • Air propelled to create forward motion