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Principles of flight_chapter_6

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Helicopters

Helicopters

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Transcript

  • 1. Principles of Flight Chapter 6 – Helicopters
  • 2. Introduction
    • A helicopter generates both lift and thrust by using its rotor blades rather than wings.
    • Blades are just wings which spin round on a central axis.
  • 3. Lift
    • To generate more lift the blades must be pitched to increase the angle of attack.
    • Pilots control known as the Collective pitch control.
  • 4. Horizontal Flight
    • The thrust is provided by tilting the disc in the direction required
    • Pilots control called cyclic pitch control or stick.
  • 5. Horizontal Flight
    • The thrust is provided by tilting the disc in the direction required
    • Pilots control called cyclic pitch control or stick.
  • 6. Horizontal Flight
    • The thrust is provided by tilting the disc in the direction required
    • Pilots control called cyclic pitch control or stick.
  • 7. Horizontal Flight
    • The thrust is provided by tilting the disc in the direction required
    • Pilots control called cyclic pitch control or stick.
  • 8. Torque Reaction
    • Is the force that tries to make the fuselage spin in the same direction as the blades.
    • Counteracted by using a tail rotor to push the fuselage in the opposite direction.
    • By altering the pitch of the tail rotor blades it can yaw the aircraft.
    • Helicopters with 2 blades – each rotor spins in different directions.
  • 9. Torque Reaction
  • 10. Torque Reaction
  • 11. Controls
    • 4 Controls
    • Collective Pitch – On left hand side, pulls up to increase lift and vice versa.
    • Hand Throttle – On the collective pitch stick, twists to give more power to rotor.
    • Cyclic Pitch – Stick between legs, left to go left, forward to go forward etc.
    • Tail Rotor - Feet Pedals, Right to yaw right and vice versa.

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