4
Instruction Manual
http://www.jperkinsdistribution.co.uk
http://www.jperkinsdistribution.co.uk
5
Instruction Manual
http://www.jperkinsdistribution.co.uk
achieved by operating the rudder stick of your E Sky
transmitter.
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 helicopter is fitted with a micro
piezo gyro and electronic mixing system which
automatically compensates for torque changes and
helps stabilise the tail making for much easier flight.
Steering control - cyclic control
The main directional or steering controls in a
helicopter are known as the 'cyclic' controls and
work by directing the thrust generated by the main
rotor blades in the direction required for flight.
When helicopter main rotor blades are spinning
in flight you will often be able to make out what
looks like a disc - as the blades blur with speed and
viewing angle. This is known as the 'rotor disc' and
is operated by the cyclic controls which are the
right hand stick of your E Sky transmitter.
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 accelerate in that direction. By
pulling the stick back, any forward speed gained
will be reduced as the rotor disc tilts backwards
and thereby reverses the thrust generated by the
forward stick command.
Steering control - roll cyclic
When hovering, a brief right control stick movement
will roll the rotor disc to the right and 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.
A helicopter in the hover behaves in an analogous
way to a stick balanced vertically on ones finger
- small movements of your hand will be required in
order to prevent the stick from accelerating away
from the vertical and falling to terra firma!
Both experienced model and full-size pilots in
the hover will gently 'nudge' the cyclic controls
automatically in order to keep their helicopter in one
spot and prevent it from accelerating away down
the flying field.
A large part of the initial learning phase in
helicopter flight is about mastering the cyclic
controls so that their correct use in the hover or
whilst 'ground handling' becomes automatic and
instinctive.
Cyclic controls in detail
In order to fly and maintain a model helicopter a
basic understanding of the control mechanisms
involved is required.
The sequence of control works like this:
As the cyclic transmitter stick is moved forwards, a
pulsed signal is picked up by the receiver in the '4
in 1' control unit which is passed to the proportional
fore and aft cyclic servo mounted in the model.
The servo output arm operates the 'swashplate'
tilting the swashplate forward. The swashplate is
connected by linkages to the flybar and control
paddles. The paddles are small 'wings' in their own
right and are connected to the rotor head. It is the
paddles that effectively drive the main rotor blade
angle and hence move the rotor disc forwards/
backwards or left/right.
When the forward cyclic command is released the
swashplate is returned to the horizontal position
and the rotor disc follows suit.
FLIGHT TRAINING GUIDE
WARNING!
If you are a newcomer to R/C model helicopters,
you must seek assistance from an experienced R/C
model helicopter pilot. You should be aware that
the main rotor blades and tail rotor blades spin at
a high rpm and are capable of inflicting serious
injury to people and animals.
You must take care when you are flying and make
sure there are no children or animals in the room
or flying area. In addition, make sure the flying area
is large enough and contains no obstacles (such as
furniture) which could be hit while you are learning
to come to terms with the flight characteristics of
your Twister.
The flying area
The flying area should be indoors in a large room
or a hall or office. In this room you should have all
doors closed as any wind can affect the movement
of the Twister.
Make sure the take-off floor has a smooth surface
rather than carpet which can trip up the Twister
during ground handling.
Be prepared for the fact that the helicopter will
slide around on the floor until flying rpm has been
reached.
STEP 1–POSITIONING
First, double check that all the controls are working
and operating correctly.
Place the model in the middle of the room.
Position yourself at least 2 metres behind the
helicopter and slightly off to one side so that you are
able to see the nose of the helicopter.
Useful tip
........................... Please note when flying
that you must always watch the nose of the
helicopter. If the nose of the helicopter yaws to the
left, you must apply right tail rotor to correct this by
pushing the tail rotor stick to the right.
STEP 2–ROTOR SPIN-UP
Watch the nose and apply just enough throttle until
the model becomes light on its skids.
Useful tip
........................... All helicopters exhibit a
degree of instability when approaching take-off due
to the side thrust generated by the tail rotor and to