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Principles of flight_chapter_6
 

Principles of flight_chapter_6

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Helicopters

Helicopters

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    Principles of flight_chapter_6 Principles of flight_chapter_6 Presentation Transcript

    • Principles of Flight Chapter 6 – Helicopters
    • 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.
    • Lift
      • To generate more lift the blades must be pitched to increase the angle of attack.
      • Pilots control known as the Collective pitch control.
    • Horizontal Flight
      • The thrust is provided by tilting the disc in the direction required
      • Pilots control called cyclic pitch control or stick.
    • Horizontal Flight
      • The thrust is provided by tilting the disc in the direction required
      • Pilots control called cyclic pitch control or stick.
    • Horizontal Flight
      • The thrust is provided by tilting the disc in the direction required
      • Pilots control called cyclic pitch control or stick.
    • Horizontal Flight
      • The thrust is provided by tilting the disc in the direction required
      • Pilots control called cyclic pitch control or stick.
    • 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.
    • Torque Reaction
    • Torque Reaction
    • 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.