J. Perkins Twister CP V2.1 User manual

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SPECIFICATIONS
Main rotor diameter ........................................ 510 mm
Fuselage length ................................................ 520 mm
Radio control .....CCPM system with 3 micro servos
4-in-1 unit ....speed cont., piezo gyro, receiver, etc.
Flying weight ...........................................................300g
CONTENTS
1 ....Assembled helicopter (incl. main & tail motors)
1 .................................... 35Mhz FM CCPM transmitter
1 .............................“4 in1” on-board electronics unit
3 ................................................................ Micro servos
1 ......................Set transmitter and receiver crystals
2 .........11.1V 1000mAh lithium polymer battery pack
1 ............... Lithium polymer DC/DC (12-15V) Charger
1 ......................................................240V power supply
1 ............ Instructional DVD (showing mode 1 setup)
1 ..........................Twister CP V2.1 instruction manual
1 ...................Lithium polymer charging/safety guide
FEATURES
❏ Factory-assembled, RC installed COMPLETELY
READY-TO-FLY collective pitch RC helicopter with
carbon fibre main blades
❏ Around 15 minutes flight time per charge
❏ Two 11.1V Lithium polymer battery, 12V DC Li-Po
fast charger with cell balancing technology & 240V
power supply
❏ CCPM control system makes for precise hovering,
instant height control and easier flight training
❏ Bell/Hiller cyclic and collective pitch system for
amazing 3D aerobatics
❏ Idle up/3D switch for circuit flying/aerobatics
❏ One-piece '4 in 1' on-board computerised electronics
unit saves weight, improves performance and
simplifies use
❏ Transmitter with training switch, 3D switch, charging
socket, adjustable height sticks and silky operation
stick units
❏ Instructional DVD included
❏ Speed controller disallows high throttle starts
❏ Throttle Fail-safe cuts in when signal lost
❏ Gyro is disabled at closed throttle to prevent
unexpected tail rotor starts during transport
❏ Ball bearing swashplate, rotor head, main shaft and
tail shaft for ultimate precision
❏ 13 Ball bearings in total
❏ Carbon fibre boom, UC struts, flybar, etc.
❏ LBW (Low battery warning beacon) alerts you when
LiPo pack is running low and needs recharging
❏ Ideal for beginner to advanced pilots
THE MOST COMPLETE COLLECTIVE PITCH TRAINER/3D
HELICOPTER IN THE WORLD
FOR INDOOR FLIGHT, TRAINING FLIGHT, OUTDOOR FLIGHT AND AEROBATIC 3D FLIGHT
NOW WITH (LBW) LOW BATTERY WARNING BEACON & 240V
POWER SUPPLY (INCLUDED FREE!)
V2.1
INCLUDED:
• Woven carbon main blades
• Two lipo batteries inlcuded
• Cell balance charger/batteries/
240v power supply
• Bell/hiller mix rotor head
• Tx with trainer & 3d switches
• Tx batteries included too!
• Instructional DVD
• Flight training guide
• LBW (low battery warning beacon)
V4.07

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VITAL SAFETY INFORMATION
❏ IF YOU HAVE NEVER FLOWN RC HELICOPTERS WE
RECOMMEND YOU SEEK ADDITIONAL ADVICE FROM
YOUR SUPPLIER OF RC HELICOPTERS.
❏ READ ALL INSTRUCTIONS CAREFULLY PRIOR TO
USING OR FLYING. CONTACT YOUR SUPPLIER IF ANY
INFORMATION IS UNCLEAR. YOU ASSUME ALL RISK
AND RESPONSIBILITY WHEN USING THIS MODEL.
❏ KEEP WELL CLEAR OF ROTATING BLADES.
NEVER WEAR LOOSE CLOTHING WHEN OPERATING
HELICOPTERS. ALWAYS WEAR PROTECTIVE EYE WEAR
WHEN OPERATING MODEL HELICOPTERS.
❏ THE TWISTER CP V2.1 IS DESIGNED FOR INDOOR
OR OUTDOOR USE, HOWEVER, FLY ONLY WHERE IT IS
SAFE TO DO SO. A HARD FLAT SURFACE CLEAR OF ALL
OBSTACLES AND A CLEAR INDOOR SPACE OF AROUND
400 SQUARE FEET IS THE MINIMUM RECOMMENDED
REQUIREMENT.
❏ DO NOT FLY NEAR CHILDREN OR ANIMALS.
CRASHES & SPARE PARTS
The Twister CP V2.1 has been designed to be strong and very easy to repair, however, the helicopter is not
invulnerable and most people will tip their Twister CP V2.1 over or break parts during their flying career.
This is quite normal. Crash damage is not covered by warranty.
All parts are available as spares from your supplier. Study the exploded view of the helicopter carefully to
understand the relationship between parts and how to replace them if necessary.
DVD–IMPORTANT INFORMATION
Transmitter mode–Please note that the Instructional Flight DVD included with this helicopter shows use of
a MODE 1 transmitter–a different transmitter setup to the mode II transmitter supplied. A mode I transmitter
has throttle and roll on the right stick. In the UK, most pilots fly mode II, throttle and tail rotor on the left
hand stick, cyclic on the right stick.
Aerial deployment–contrary to the video, please ensure your receiver aerial is COMPLETELY unwrapped
from the skid as per this manual.
J. Perkins Distribution Ltd guarantees this product is free from manufacturing or assembly defects for a period of one
year from time of purchase. This does not affect your statutory rights. This warranty is not valid for any damage or
consequential damage arising as a result of a crash, misuse, modification or for damage or consequential damage arising
as a result of failure to observe the procedures outlined in this manual. Operation of this model is carried out entirely at
the risk of the operator. Please note that, whilst every effort is made to ensure the accuracy of the material included with
this product, mistakes can occur and neither J. Perkins Distribution Ltd nor it’s distributors will be held liable for any loss
or damage arising from the use of this model or for any loss or damage arising from omissions or inaccuraccies in the
associated instructions or materials included with this product.
We reserve the right to modify the design of this product, box contents and instruction manual without prior notification.
E&OE. © 2007 All rights reserved.
J Perkins Distribution Ltd, Northdown Business Park, Ashford Road, Lenham, Kent, ME17 2DL, UK..
Contents
Introduction .................................................... 1
Preparing for flight ......................................... 2
1. Unpacking your Twister CP V2.1 ...... 2
2. Charging the flight battery ................ 2
3. Fitting the flight battery ..................... 2
Preflight checks ............................................. 2
1. 4 in 1 unit checks ................................ 2
2. Rotor blades check ............................ 3
3. Visual check ........................................ 3
4. Switch on transmitter ........................ 3
5. Range check ....................................... 4
6. Control operation check ................... 4
Advanced flying features ............................. 5
How does a helicopter fly? ........................... 5
Flight training guide ....................................... 7
Step 1–Positioning ................................. 7
Step 2–Rotor spin-up ............................. 7
Step 3–Going for a walk ........................ 7
Step 4–Taking the first 'hop' ................. 7
Step 5–Hovering and manoeuvres ...... 8
Step 6–Beyond the hover ..................... 8
Troubleshooting .............................................. 9
Vibration .................................................. 9
Main rotor does not turn ....................... 9
Main rotor turns but helicopter does not
take off ..................................................... 9
LBW (Low battery warning beacon) ........... 9
Spare parts and option parts ..................... 10
Twister CP EXPLODED VIEW ...................... 14
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INTRODUCTION
Congratulations on your purchase of the most
complete, high quality collective pitch micro
helicopter available today.
The Twister CP V2.1 is ready to fly and includes
charger, Lipos and 240V power supply. It is designed
for use indoors and outdoors in an adequate and
safe space.
This electric helicopter is designed by expert
engineers and assembled at the factory. It is very
strong, with numerous innovative safety features.
The Twister CP V2.1 employs the highest quality
CCPM (cyclic and collective pitch mixing) control
systems and engineering.
Collective pitch
Collective pitch provides much easier height control
than fixed pitch and although more complex,
makes flying easier and more stable. Even outdoor
circuit flight and aerobatics (or 3D flight) is easily
achievable using the Twister CP V2.1.
Carbon fibre
Careful and appropriate use of carbon fibre has
been made throughout to improve strength and
save weight, whilst many precision miniature ball
bearings support the important components.
Electronics & safety
The '4-in-1' on-board electronics package includes
6 channel receiver, piezo gyro, electronic mixers
and speed controllers PLUS a computer fail-safe, an
LED system check, and a motor safe-start facility.
The fail-safe cuts power to the main motor in the
event of transmitter failure, whilst the safe-start
only allows starting when the throttle stick is
low–so there is no danger of connecting the flight
battery and inadvertently sending power instantly to
the motors.
CCPM
The CCPM transmitter has been designed especially
for flying the CP helicopter and features high
quality, adjustable stick units, convertible between
Mode II (throttle left) and Mode I (trottle right).
The transmitter incorporates a 'buddy box' trainer
socket, a charging socket, a flight trainer switch
and a 3D/Idle up flight switch. Both transmitter trims
and stick units operate at a professional level of
quality–a vitally important feature for successful
helicopter control.
The Twister CP V2.1 performs magnificently
outdoors and has a sparkling climb rate and great
aerobatic/3D performance. Straight line stability in
fast forward flight is excellent and is on a par with
quality model helicopters many times its size!
Spares are available through all good model shops.
NEVER FLOWN? PLEASE READ...
Welcome to the fascinating world of RC model
helicopters.
If you are new to RC model helicopters, please
do not expect to be able to 'open the box and
immediately 'fly around'. This model requires a
commitment by the customer to spend time learning
the procedures required for safe and successful
operation.
To most people, this represents an interesting and
usually exciting challenge. During the course of
this manual we shall present you with an outline of
the way model helicopters operate plus suggested
training techniques written by experienced RC
model helicopter pilots. We hope this well help
you. However, this information is not designed as a
definitive guide and is not a guarantee that you will
achieve successful helicopter flight. Neither do we
guarantee you will not break anything!
If this is not what you expected and demands more
commitment than you wish to give, we advise you
not to buy this product.
Safety
On a 'safety first' note, you should be aware that the
rotor head speed of a collective pitch model such as
this, is markedly higher than the fixed pitch Twister
helicopter. Hence, a good deal more damage will
be caused should the helicopter strike a person or
object!
Please observe the principles of safety prepared by
the British Model Flying Association:
(http://www.bmfa.org/)
in their safety code which is available on-line.
Advantages of collective pitch
A collective pitch model such as this is easier to
fly than a fixed pitch model, chiefly because height
control is instant and very precise. Also, a collective
pitch helicopter is capable of advanced outdoor
flight manoeuvres—unlike a fixed pitch helicopter.
Please note, that unlike fixed wing aircraft where
advanced models are more difficult to fly, collective
pitch helicopters are easier to fly than fixed pitch
helicopters!
Your supplier will be pleased to advise you on
additional sources of information if you wish to
know more about RC model helicopters.

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PREPARING FOR FLIGHT
1. UNPACKING YOUR TWISTER CP
V2.1
▼ 1. Carefully remove the model and other items
from the packaging.
▼ 2. Screw the transmitter aerial into its socket
in the top of the transmitter.
▼ 3. Insert the 8 supplied AA batteries into the
transmitter battery compartment being
careful to observe battery polarity.
▼ 4. Unwrap the receiver aerial ENTIRELY from
its stowed location around the right side
undercarriage (and feed into the aerial
tidy to prevent it from being caught in the
blades). Do NOT tape it to any helicopter
components as this may cause interference.
WARNING!
RC flight is achieved through low power RF
transmissions and is susceptible to interference.
The carbon and metal parts in a helicopter create
potential interference hazards for your receiver,
therefore it is important to route the receiver aerial
directly away from the helicopter and away from
interference hazards.
Useful tip ........................... Although the Twister CP
V2.1 is very strong and includes many carbon fibre
parts, all model helicopters require careful handling
and a delicate touch when setting up for flight or
during maintenance. In particular, take great care
with the electrical connections to and from the '4-
in-1' control unit.
2. CHARGING THE FLIGHT BATTERY
The Li-Po charger supplied is designed to
automatically charge and balance the 11.1V Li-Po
battery from the 240V mains power supply included
in the kit or a 12V DC source such as a gel cell
battery (JP No. 5510050 12V 7Ah - Not included).
Connect the charger to your power source and
the Li-po battery to the charger using the white
polarised multi-pin connector.
Follow the instructions on the front of the charger to
charge the battery.
WARNING!
Li-poly batteries can be dangerous!
Please take time to read the procedures outlined in
the supplemental instructions for charging Lithium
Polymer batteries.
The charger is designed to cut off when full
capacity is reached.
Under no circumstance must a battery be left
charging unattended!
3. FITTING THE FLIGHT BATTERY
▼ 1. Place the charged battery pack onto the
battery holder using Velcro supplied and
secure in place with rubber bands.
Do not connect to the RC equipment!
PREFLIGHT CHECKS
1. 4 IN 1 UNIT CHECKS
The 2 trimmers on the front of the '4-in-1' unit are
factory adjusted and should need no adjustment.
The status LED is next to the trimmers. The trimmers
perform these functions:
Gyro gain Status LED
Mix gain

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▼ Gyro gain. The left trimmer (GAIN) adjusts
the amount of gyro tail stabilisation from 0 to
100%. The gyro automatically stabilises the
tail against torque changes and gusts. 90%
is usually the best setting.
▼ Mix gain. The right trimmer
(PROPORTIONAL) adjusts throttle/tail mixing
from 0 to 100% and is very uncritical. 90% is
usually the best setting.
WARNING!
This unit contains delicate electronics. If your
model tips over or crashes when flying or if your
Twister CP V2.1 motors are physically stalled and
prevented from turning, you must immediately
reduce throttle to avoid damage to the speed
controllers and other components.
Crash damage and motor stall damage is not
covered by warranty.
2. ROTOR BLADES CHECK
▼ Unfold the main rotors to the flying position
as per the above pic ensuring they are
exactly perpendicular to the flybar and
paddles and that they are not damaged.
3. VISUAL CHECK
▼ Check that all linkages and connectors are
attached and that rotating parts are free to
rotate smoothly.
▼ Check that all linkages move freely with no
binding or stiffness. Free off any linkages
that show any level of tightness or binding.
4. SWITCH ON TRANSMITTER
The transmitter is supplied in Mode II version where
the left stick controls height (climb or descent) and
tail rotor (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. Note that the included
DVD shows the use of a Mode I (throttle right)
transmitter. See pic following for Mode II layout
with throttle stick on the left side .
▼ 1. Move the throttle stick and throttle trim of
your transmitter to the lowest (low throttle)
position.
▼ 2. Centre the trim controls for the 3 other
transmitter functions.
▼ 3. Extend the transmitter aerial fully.
▼ 4. Switch on the transmitter.
▼ 5. Check that the receiver aerial is unwrapped
ENTIRELY from its stowed location around
the right side undercarriage (tape the aerial
along one of the undercarriage skids and
then tape to rear fin).
▼ 6. To power up the helicopter, you must
connect the JST battery connector to the
matching lead emerging from the ‘4-in-1’
control unit.
Do this now - ensuring you are well clear of
main and tail rotors and that throttle stick
and trim are in the low position.
▼ 7. Observe the ‘4-in-1’ status LED. Initially,
it will blink red, then blink green. After
the on-board computer has completed
satisfactory systems checks, it will glow
green continuously.
Do not move the helicopter during this checking
and calibration process.
WARNING!
Keep hands, clothing, eyes, animals and children
well clear when connecting power to this model
or flying it!
WARNING!
Do not operate this model with a collapsed or
partially collapsed transmitter (or receiver) aerial.
The model may suffer from interference and may
endanger your personal safety! Always extend
aerials fully. Never tape an aerial to any carbon
fibre helicopter components.
Throttle and tail
rotor control
Cyclic steering
controls
Tail
trimmer
Roll cyclic
trimmer
Throttle
trimmer
Forward/
Backward
cyclic trimmer

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5. RANGE CHECK
▼ Check that all controls operate without
interference at a minimum distance of 50
metres with transmitter and receiver aerials
extended.
WARNING!
At distances of greater than 50 metres, it will
become impossible to see your Twister CP V2.1
clearly enough to be able to control it safely. Do not
fly at 50 metres distance or greater.
We strongly recommend you fly no further away
than 15 metres.
6. CONTROL OPERATION CHECK
▼ 1. The helicopter swashplate should be
perfectly horizontal when viewed from
the side and horizontal with the flybar and
paddles when viewed from the side of the
helicopter. If it is not, adjust the transmitter
trims until it is.
▼ 2. Roll cyclic - Move the roll (aileron) stick to
the left. The swashplate should tilt to the
left. If it tilts the opposite way, reverse the
roll (AIL) reverse switch on the front of the
transmitter.
▼ 3. Fore and aft cyclic - Move the fore and aft
(elevator) stick forward. The swashplate
should tilt forward. If it tilts the opposite way,
reverse the fore and aft (ELE) reverse switch
on the front of the transmitter.
▼ 4. Slowly move the throttle trim forward until
the tail rotor unit rotates but the main rotor
does not.
▼ 5. Move the tail rotor stick gently to the right.
The nose of the helicopter should try to
swing right (whilst the tail swings left).
▼ 6. Throttle - Slowly push the throttle stick
forward and check that the main rotors start
to rotate. Then immediately throttle back.
Your Twister CP V2.1 is ready for flight.
N.B. After finishing flying you should always first
disconnect the battery from the helicopter FIRST.
Then switch off the transmitter.
WARNING!
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 are
is large enough and contains no obstacles (such as
furniture), which could be hit while you are flying
your Twister CP V2.1.

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ADVANCED FLYING FEATURES
Flybar weights
Your Twister CP V2.1 is equipped with adjustable
flybar weights which are designed to increase
stability as they are moved further out along the
flybar. Moving the weights inboard will make the
helicopter more responsive to cyclic commands.
After adjustment, flybar balance must be checked
by releasing all linkages to the flybar and observing
which way the flybar seesaw unit falls. Adjust until
balanced.
3D/idle up switch
The Twister CP V2.1 transmitter features an idle up
switch. This is for use when flying outdoors and for
performing aerobatic manoeuvres.
When the switch is pulled forward, a new 'throttle
curve' and 'pitch curve' are applied.
With idle up on, collective pitch travel is increased
at low stick, whilst at the same time, power is never
allowed to fall below 60% over the lower half of
throttle stick travel.
The nett effect is to provide high power at low
throttle stick positions thus providing a constant
rotor speed during aerobatic and descending flight
patterns.
WARNING!
Do not operate this switch unless you are an
experienced pilot!
If you are new to RC helicopters we recommend
you read the following sections:
How does a helicopter fly?
Flight training tips
NEVER FLOWN R/C
HELICOPTERS?
WE RECOMMEND YOU
SEEK ADVICE FROM
YOUR LOCAL MODEL
SHOP
HOW DOES A HELICOPTER FLY?
Both model and full-size helicopters are controlled
in similar ways. A helicopter must be controlled
about 4 axes simultaneously; yaw, pitch, roll and
height. Your transmitter has 2 dual-axis precision
stick units designed specifically for this task. The
transmitter is supplied in Mode II version where
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.
Note that the included DVD depicts the use of a
Mode I (throttle right) transmitter.
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.
Tail control
Motor-driven rotor blades generate an opposing
force (torque) that acts on the body of the
helicopter, twisting the fuselage in the opposite
direction of rotation to the main rotor blades. This
rotation needs to be balanced by thrust generated
by the tail rotor.
When a helicopter is in the hover and the torque
generated by the main rotor has been balanced
by the tail rotor, a helicopter can be yawed left or
right. If the tail rotor speed is increased, more tail
thrust is generated and the nose of the helicopter
yaws (swings) to the right. If the tail rotor speed
is decreased the nose of the helicopter will swing
to the left. This is called 'tail rotor control' and is
achieved by operating the rudder stick of your
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 CP V2.1 helicopter is fitted with a micro
piezo gyro and electronic mixing system which

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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 on the right hand
stick of your 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 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.
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.

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FLIGHT TRAINING GUIDE
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 CP V2.1.
Make sure the take-off floor has a smooth surface
rather than carpet which can trip up the Twister CP
V2.1 during ground handling.
Be prepared for the fact that the helicopter will
slide around on the floor until flying rpm has been
reached.
WARNING!
If you are a newcomer to R/C model helicopters, we
advise you 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
damage to objects, 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 CP V2.1.
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
turbulence generated by the main rotor blades.
These disturbing influences mainly manifest
themselves as a drift to the left before and during
take-off and a tendency to yaw left or right just prior
to take-off.
Observe whether or not the helicopter is tending to
tilt forwards or backwards.
If it tilts forward, you will need to apply rear elevator
(rear cyclic) trim to correct. And vice versa if the
Twister CP V2.1 tends to tilt backwards towards you.
Observe the helicopter about the roll axis and adjust
the trims in the same way–if it tends to roll or hop to
the left, apply a little right roll trim and vice versa.
Adjust the trims until the Twister CP V2.1 shows no
detectable forward, backwards or sideways drift
tendencies.
Useful tip ........................... When applying throttle,
you must apply it gently and in small amounts.
At this stage the Twister CP V2.1 MUST STAY ON
THE GROUND!
Too much throttle will cause the helicopter to leave
the ground and you may have difficulty in bringing it
under control quickly enough to avoid tipping it over.
WARNING!
Too much throttle applied too quickly will cause
your helicopter to leap rapidly and uncontrollably
into the air!
Never apply too much throttle too quickly.
STEP 3–GOING FOR A WALK
The helicopter should now be trimmed and you
should be in a position to start learning to 'take your
Twister CP V2.1 for a walk'. These first flights should
be made with the Twister CP V2.1 in contact with
the ground at all times.
Apply just enough power to make the helicopter
light on the skids and add a few clicks of forward
trim to tilt the rotor disc forwards.
Apply enough power so that the machine starts
to move slowly forwards. Watch for any change
of direction of the model and use the controls to
correct. If you cannot correct immediately, reduce
the throttle and try again. The aim is to travel
steadily and progressively across the floor.
Walk forwards following the helicopter across the
floor whilst using the controls to maintain slow and
accurate progress.
The 'walking technique' is the method required
to safely develop the automatic ability to apply
the right control input when needed. You must
practice this until you believe you are starting to
automatically input the control commands required
to keep the helicopter moving gently forwards along
the ground.
When you feel confident in your ability to operate
the controls correctly, proceed to the next step...
STEP 4–TAKING THE FIRST 'HOP'
If you are ready for the first 'hop' into the air you will
have spent some time mastering the skills required
to observe the attitude of your Twister CP V2.1. You
should be making the necessary control inputs
automatically and you should able to make smooth
progress across the surface of your floor.
If you cannot, please keep practicing Step 3!
The first 'hop' is a natural next step from walking
your Twister CP V2.1. Whilst walking you apply a
small amount of extra throttle to briefly raise the
helicopter off the floor and into the air for a second.
Then you should reduce throttle almost immediately

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to settle back onto the floor.
You will notice that as the helicopter breaks free
from the floor its nature changes and it may attempt
to accelerate in an unforeseen direction. Be
prepared for this natural consequence of leaving
the friction of the floor for the 'friction-free' realm of
'real flying'!
Most people feel they have just limited control when
they leave the safety of the floor for the first time.
However, with practice, you will find that you are
able to make more and more of the correct control
commands required to keep your Twister CP V2.1
upright and that the hops become longer and higher.
It is important during these stages to keep moving
forward by applying a small amount of forward trim
to tilt the rotor disc forwards.
Always make sure you watch the nose of your
helicopter–not the tail. The gyro will attempt to
keep the tail straight for you but you will have to use
the tail control to swing the nose of the helicopter
straight as you make progress across the floor.
Keep practising and you will find that your flights
will become longer.
Also please note that, depending on the size of
your room, some control instability may be felt as a
result of the air circulated around the room by your
helicopters down draft. If you find this off-putting,
we suggest that you land and let the air settle.
Please be aware that a model helicopter in the
hover–regardless of design–will never stay still!
A helicopter will always require some level of input
to stop drift or a tendency to turn or climb. This is
not a sign of something faulty with the helicopter,
but is in the nature of a hovering helicopter.
As you become more familiar with your helicopter,
you will find that your developing hand/eye co-
ordination skills will enable you to correct any drift,
roll or yaw almost as soon as it starts, and this will
make your flying smoother and less jerky.
By this stage in your training you should be able to
manage hops at a height of between 10 and 30cm
with duration of 5-10 seconds per hop. Flights will
become longer and easier as your co-ordination
and understanding of flight dynamics develop.
STEP 5–HOVERING AND
MANOEUVRES
By now you will have realised that in order to
maintain flight, brief control inputs or 'nudges' are
required–plus enough practice to manage operation
of all the primary flying controls successfully
together.
As your co-ordination and anticipation improves,
you should be able to reduce forward speed when
making 'hops', thereby bringing your helicopter into
a hover.
Practice hovering until you feel confident with the
basic handling of your helicopter.
Next, you should start experimenting at rotating
(yawing) the helicopter slightly to the left or right
using the tail rotor (yaw) controls–but only proceed
to this stage when you have mastered the hover!
From the hover, yaw the model a few degrees
left and then back to straight ahead–always
remembering to watch the nose. Practice yawing to
left and to right until you feel confident.
Next, practice crabbing your Twister CP V2.1 to
the right and left using cyclic controls. Proceed as
follows:
From the hover, briefly 'nudge' a small amount of
right roll. Your Twister CP V2.1 will start a drift to the
right. Put in a small amount of opposite roll to halt
the drift, then a small amount of left roll to start a
drift to the left. You will probably need to keep the
tail straight using tail rotor whilst doing this. Always
be ready to correct the drift by using opposite roll.
If you get into trouble at any stage, reduce the
throttle, land, change you trousers and try again.
STEP 6–BEYOND THE HOVER
As you become more proficient with your helicopter
you will want a larger space so you can really start
to fly around instead of hovering about all day.
If you do fly outside, please remember that any wind
will affect the performance of your Twister CP V2.1.
Please keep this in mind if you do fly outdoors and
don't be too surprised if, while flying your model, it
suddenly climbs or drops without you making any
input. This can be caused by a breeze or even a
'thermal' coming through.
A training undercarriage can be a huge help by
providing your Twister CP V2.1 with a wide track
and a degree of cushioning to aid stability and
therefore help prevent 'tip-overs'. See the parts
listing at the end of this manual. Another useful
training aid is a computer flight simulator which can
greatly enhance and speed up the learning process.
In addition a simulator is great for teaching you
“nose in”. This is when the nose of the helicopter
is pointing at you and where some of the controls
become effectively reversed–which can catch out
both experienced and novice pilots alike!
GOOD LUCK AND HAPPY FLYING!

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TROUBLESHOOTING
VIBRATION
▼ Solution 1 – Out of balance main blades
If vibration of tail boom or undercarriage is
noticeable, the most likely problem will be
out of balance main blades. To cure this,
balance the blades as follows: Remove the
complete rotor head from the main shaft.
Support the head assembly by placing the
flybar paddles on 2 glass tumblers or similar.
Observe which blade falls lowest and add
sellotape or similar to the undersurface tip
area of the higher blade. Adjust until the
blades are level and re-attach rotor head.
▼ Solution 2 – Bent main shaft
The tail boom and undercarriage will vibrate
if the main shaft is bent. Replace the main
shaft and gear unit if you suspect a bent
main shaft
▼ Solution 3 – Main blades too tight. If the blade
retaining bolts have been done up too tight,
the helicopter will vibrate and/or 'nod'.
Loosen the blades and try again.
▼ Solution 4 – Blade tracking is out.
Sometimes, the rotor blades will fly at
different heights and this will cause
vibration. When the helicopter rotor disc is
viewed in flight, the red-tipped main blade
may fly at a different height to the other
main blade. The blades are running 'out
of track'. Note which blade is lower. Land
the helicopter and lengthen the pitch arm
link pt. no 6601210 of the lower flying blade.
The idea is to increase the blade's angle
of attack which will make the blade to fly
higher. Be careful you do not damage any
parts. Test fly and check tracking again.
Adjust again if required until the blades run
'in track' as closely as possible.
▼ Solution 5 – Flybar paddles out of balance.
Check that the distances from the rotor
hub centre out to the flybar paddles are the
same for both paddles. Adjust the flybar
position by loosening the flybar retaining
collars associated with part no 6601190,
re-centring the flybar, then tightening the
retaining collar grub screws. N.B. A small
allen key will be required.
MAIN ROTOR DOES NOT TURN
▼ Solution 1 – Check throttle stick and trim lever
are in the fully down position.
▼ Solution 2 – Check all electrical connectors
and that the '4-in1' receiver crystal is seated
securely in the socket in the '4-in-1' unit.
MAIN ROTOR TURNS BUT
HELICOPTER DOES NOT TAKE OFF
▼ Solution 1 – This sometimes happens if your
rotor blades are flying at too low or too
shallow an angle. The helicopter will
sometimes take off but appears to have too
little power to climb. This is nearly always
because one main blade is flying too low. If
you can see which blade is flying low, follow
the same procedure as outlined in Solution
4. Alternatively, increase the flying angle of
both main blades as outlined in Solution 4.
▼ Solution 2 – Main motor needs to be loosened
because the main gear/motor pinion gear
mesh is too tight. The motor is retained by
2 screws. Slacken off both screws. Push
the motor away from the main gear and
retighten the screws in the new position.
LBW SYSTEM
Now included on the Twister CP V2.1 is this clever
device, this is designed to alert pilots when the
Li-Poly battery pack is running low and needs
recharging.
When this light flashes, land immediately and
recharge the Li-Poly battery pack as per the
instructions on page 2.
Failure to land immediately could result in the
battery pack being over discharged.

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TWISTER CP V2 SPARE PARTS
6600710 MAIN FRAME SET
6600750 HEAD/MAIN SHAFT BEARINGS 3X6X2.5 (2)
6600770 TAIL HOUSING
6600780 VERTICAL FIN SET
6600800 TAIL GEAR & SHAFT
6600810 TAIL BEARING 2X6X3 (2)
6600820 TAIL ROTOR BLADE UNIT
6600850 ALLEN KEY/TIE WRAPS/SERVO TAPE
6600855 HEAD RETAINING PIN (5)
6600382 370 MAIN MOTOR WITH 9T PINION
6601130 TAIL MOTOR (8T PINION)
6601140 MOTOR WIRE (MAIN AND TAIL)
6601150 CENTRE HUB AND SPINDLE SHAFT
6601160 FLYBAR HUB/BEARINGS/CRADLE
6601170 CP MAIN BLADES WOOD (PAIR)
6601180 FLYBAR CONTROL UNIT
6601190 FLYBAR (2)
6601200 FLYBAR PADDLES (2)
6601210 FLYBAR-MIXER LINK SET (2)
6601215 (V2) SWASH-MIXER DOUBLE LINK (2)
6601220 (V1) SWASHPLATE
6601222 (V2) SWASHPLATE
6601230 SERVO LINK SET (3)
6601240 BATTERY MOUNTING SET
6601250 MAIN GEAR & MAIN SHAFT SET
6601260 UNDERCARRIAGE SET (CARBON STRUTS)
6601270 CABIN SET ASSEMBLED WITH DECAL
6601280 'O' RING/SILICONE TUBE SET
6601290 SCREW & NUT SET
6601300 TAIL BOOM (CARBON FIBRE)
6601310 (V1) BLADE HOLDER SET (2)
6600381 (V2) BLADE GRIP SET
6601320 SWASHPLATE TO FLYBAR LINKS (2)
6601330 MAIN SHAFT RETAINING COLLAR
6601340 FLYBAR PADDLE WEIGHTS (2)
6601350 MAIN FRAME/BOOM/TAIL HOUSING SET
SPARE PARTS AND OPTION PARTS
TWISTER CP R/C PARTS AND ELECTRIC ACCESSORIES
6600295 11.1V 1000mAh (HD) (LI-POLY) PACK JST
6600355 CCPM 4-IN-1 ESC/GYRO/MIXER/RX UNIT
6600330 240v (TO 12v DC) POWER SUPPLY (3 PIN)
6600331 240v (TO 12v DC) POWER SUPPLY (2 PIN)
7711050 TRANSMITTER 35FM 5-CH TX (CCPM)
7712110 SUPER MICRO 7.5g SERVO (S7.5 EnErG)
6600362 EnErG 7.5g SERVO GEAR SET (NEW 15Z)
TWISTER CP OPTION & CNC PARTS
6601120 370 MAIN MOTOR W/8T PINION (HIGH TORQUE)
6600380 (V2) COMPLETE BELL/HILLER ROTOR HEAD
6600384 CARBON TAIL ROTOR (OPTION)
6600386 CP CNC ALU.SWASHPLATE SET (OPTION)
6600390 CP CNC ALU.MAIN B/HOLDER SET (OPTION)
6600392 CP CNC MAIN ROTOR HUB SET (OPTION)
6600400 CP SYM.CARBON MAIN BLADE SET
6600405 CP CNC ROTORHEAD & S/PLATE SET (OPT)
6600410 CP SPINDLE SHAFT FOR OPTION ROTOR
6600840 TWISTER TRAINING UNDERCARRIAGE SET
6600860 TAIL MOTOR HEAT-SINK
6600870 MAIN MOTOR HEAT-SINK
6600379 MINI/MICRO HELI PITCH GAUGE

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6600710 MAIN FRAME SET
6600750 HEAD/MAIN SHAFT
BEARINGS 3x6x2.5 (2)
6600770 TAIL HOUSING
6600780 VERTICAL FIN SET
6600800 TAIL GEAR & SHAFT
6600810 TAIL BEARING 2x6x3 (2)
6600820 TAIL ROTOR BLADE UNIT
6600850 ALLEN KEY/TIE WRAPS/
SERVO TAPE
6600855 HEAD RETAINING PIN
6600382 370 MAIN MOTOR
WITH 9T PINION
6601130 TAIL MOTOR (8T PINION)
6601140 MOTOR WIRING
6601150 CENTRE HUB AND
SPINDLE SHAFT
6601160 FLYBAR HUB/
BEARINGS/CRADLE
6601170 MAIN BLADES WOOD
6601180 FLYBAR CONTROL UNIT
6601190 FLYBAR (2)
6601200 FLYBAR PADDLES (2)
6601210 FLYBAR-MIXER LINK
SET (2)
6601215 (V2) SWASH-MIXER
DOUBLE LINK (2)
6601220 (V1) SWASHPLATE
6601222 (V2) SWASHPLATE
6601230 SERVO LINK SET (3)
6601240 BATTERY MOUNTING
SET
6601250 MAIN GEAR AND MAIN
SHAFT SET
6601260 UNDERCARRIAGE SET
SPARE PARTS

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6601270 CABIN SET ASSEMBLED
6601280 O RING/SILICONE SET
6601290 SCREW & NUT SET
6601300 TAIL BOOM (CARBON
FIBRE)
6601310 (V1) BLADE HOLDER SET
6600381 (V2) BLADE GRIP SET
6601320 SWASHPLATE TO
FLYBAR LINKS
6601330 MAIN SHAFT
RETAINING COLLAR
6601340 FLYBAR PADDLE
WEIGHTS
6601350 MAIN FRAME/BOOM/
TAIL HOUSING SET
SPARE PARTS CONTINUED...

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6601120 370 MAIN MOTOR
(8T PINION) (HIGH TORQUE)
6600380 (V2) COMPLETE BELL/
HILLER ROTOR HEAD
6600384 CARBON TAIL ROTOR
6600386 CNC ALU.SWASHPLATE
6600390 CNC ALU.MAIN BLADE
HOLDER
6600392 CNC MAIN ROTOR HUB
6600400 SYM.CARBON MAIN
BLADE SET
6600405 CNC ROTORHEAD &
SWASHPLATE
6600410 CP SPINDLE SHAFT FOR
OPTION ROTOR
6600840 TRAINING
UNDERCARRIAGE SET
6600860 TAIL MOTOR HEAT-SINK
6600870 MAIN MOTOR HEAT-
SINK
6600379 MINI/MICRO HELI PITCH
GAUGE
6600295 11.1V 1000mAh LI-POLY
6600355 CCPM 4-IN-1 ESC/GYRO/
MIXER/RX UNIT
6600330 240v (TO 12v DC) POWER
SUPPLY (3 PIN)
6600331 240v (TO 12v DC) POWER
SUPPLY (2 PIN)
7711050 TRANSMITTER 35FM
5-CH TX (CCPM)
7712110 SUPER MICRO 7.5g
SERVO (S7.5 ENERG)
6600362 7.5g SERVO GEAR SET
OPTION PARTS R/C & ELECTRIC EQUIPMENT

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TWISTER CP V2.1 EXPLODED VIEW