J. Perkins TWISTER BELL 47, Руководство пользователя

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Twister Bell 47
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http://www.jperkinsdistribution.co.uk
Twister Bell 47
HOW DOES A HELICOPTER FLY?
A helicopter must be controlled about 4 axes
simultaneously; yaw, pitch, roll and height. Your
transmitter has 2 dual-axis precision stick units with
two controls on each stick.
In a throttle left (mode 2) transmitter the left stick
controls height (climb or descent) and tail rotor
controls yaw (left or right).
The right stick operates the cyclic steering controls
which are used to pitch the helicopter nose up/nose
down and to roll the helicopter left or right.
The revolutionary contra-rotating sytem used in
the Twister Bell 47 transforms helicopter flight by
making control so easy that the helicopter almost
flys itself!
Transmitter stick movements
Helicopters require relatively small control inputs of
relatively small duration. Do not move the sticks to
extreme positions. A delicate touch is required on
the sticks. The sticks should be allowed to return to
neutral almost immediately after a control input is
made. If you watch an experienced pilot hovering
his helicopter, you will see that his transmitter sticks
hardly move. This is the goal you will be working
towards in this guide.
Height control
A helicopters rotating wings - the rotor blades,
generate lift, in the same way that a propeller
generates thrust. The lift generated by the main
rotor blades increases as rotor speed rises causing
the helicopter to climb. Conversely as the main rotor
speed is reduced, the helicopter descends.
This method of helicopter height control is called
'fixed pitch'.
Height is managed using the throttle stick of your
transmitter.
Push forward to climb, pull back to descend.
Yaw control
Yaw control is achieved by altering the speed of
one main rotor relative to the other which causes
a change in the torque generated by the main rotor
and hence a rotation to left or right about the main
rotor shaft.
When a helicopter is in the hover it can be yawed
left or right.
Push the rudder stick left to yaw the nose of the
helicopter to the left and push to the right to yaw the
nose right.
Your Twister Bell 47 helicopter is fitted with a micro
piezo gyro and electronic mixing system which
automatically helps stabilise the tail making for
much easier flight.
Steering control - fore and aft cyclic
When hovering, a brief forward push on the cyclic
control stick will tilt the rotor disc forward causing
the helicopter to move off in that direction. Pull the
stick back gently to stop it. If you pull the stick back
further, you start flying backwards.
Steering control - roll cyclic
When hovering, a brief right control stick movement
will roll the rotor disc to the right and the helicopter
will start moving to the right. By briefly moving the
stick to the left any right drift or movement will be
arrested or reduced.
Mastering the hover
Both experienced model and full-size helicopter
pilots in the hover will gently 'nudge' the cyclic
controls automatically in order to keep their
helicopter in one spot and prevent it from moving
away from that spot.
A large part of the initial learning phase in
helicopter flight is about mastering the cyclic
controls and learning to hover. Control commands
will become 'instinctive' when you have 'mastered'
the hover.