Principles of Flight LO6
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Transcript Principles of Flight LO6
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.