AirTek Twister CP Gold, User Manual, Page: 9 / 16

9
Twister CP Gold
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
main 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 some tape to the underside
tip of the higher blade. Adjust until the blades are
level and re-fit the rotor head assembly.
Solution 2 - Bent main shaft.
The tail boom and undercarriage will vibrate if
the main shaft is bent. Replace the main shaft
and gear if you suspect that the main shaft is
bent.
Solution 3 - Main blades too tight.
The helicopter can also vibrate if the main blade
retaining bolts are too tight. Loosen the bolts
slightly and re-try.
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 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 heli-
copter and lengthen the pitch control link
(#6601210) of the lower flying blade. This in-
creases the blades angle of attack which will
make the blade fly higher. Test fly and check the
blade tracking once again. Re-adjust if neces-
sary to get the blades to run ’in track’ as close as
possible.
Solution 5 - Flybar paddles out of balance.
Check that the distances from the centre hub out
to the flybar paddles are the same for both pad-
dles. Adjust the flybar position by loosening the
flybar retaining collars associated with part
#6601190 and sliding the flybar through the cen-
tre hub. Re-tighten the retaining collars.
MAIN ROTOR DOES NOT TURN
Solution 1 - Check throttle stick and trim
lever are both fully down when turning on the
helicopter.
Solution 2 - Check all electrical connections.
Check that all electrical connectors are seated
properly. The receiver crystal should also be
checked to make sure that it is seated securely
in its socket.
MAIN ROTOR TURNS BUT HELICOPTER
DOES NOT TAKE OFF
Solution 1 - This sometimes happens if your
rotor blades are flying too low (not enough pitch).
The helicopter will sometimes take off, but ap-
pears to be low on power. This is nearly always
because one blade is flying too low. If this is the
case, follow the procedure outlined in Solution 4
of VIBRATION.
Solution 2 - Gear mesh too tight.
This is rectified by loosening off the motor retain-
ing screws and pushing the motor away from the
main gear slightly. Re-tighten the mounting
screws to secure the motor in its new position.
The LBW (Low Battery Warning) System is de-
signed to alert the pilot when it is time to land
and recharge the Lithium Polymer flight battery.
It is important that the pilot land the helicop-
ter as soon as possible after the LBW light
comes on.
This will prevent the battery being damaged due
to over discharging.
LBW SYSTEM