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TROUBLESHOOTING
VIBRATION
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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
fl ybar 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-fi t the rotor head assembly.
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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.
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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.
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Solution 4 – Blade tracking is out.
Sometimes, the rotor blades will fl y at
different heights and this will cause
vibration. When the helicopter rotor disc is
viewed in fl ight, the red tipped blade may fl y
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 control link (#6601210)
of the lower fl ying blade. This increases the
blades angle of attack which will make the
blade fl y higher. Test fl y and check the blade
tracking once again. Re-adjust if necessary
to get the blades to run ’in track’ as close as
possible.
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Solution 5 – Flybar paddles out of balance.
Check that the distances from the centre
hub out to the fl ybar paddles are the same
for both paddles. Adjust the fl ybar position
by loosening the fl ybar retaining collars
associated with part #6601190 and sliding
the fl ybar through the centre hub. Re-tighten
the retaining collars.
MAIN ROTOR DOES NOT TURN
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Solution 1 – Check throttle stick and trim lever
are both fully down when turning on the
helicopter.
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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
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Solution 1 – This sometimes happens if your
rotor blades are fl ying too low (not enough
pitch). The helicopter will sometimes take
off, but appears to be low on power. This
is nearly always because one blade is
fl ying too low. If this is the case, follow
the procedure outlined in Solution 4 of
VIBRATION.
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Solution 2 – Gear mesh too tight.
This is rectifi ed by loosening off the motor
retaining screws and pushing the motor
away from the main gear slightly. Re-tighten
the mounting screws to secure the motor in
its new position.
LBW SYSTEM
The LBW (Low Battery Warning) System is designed
to alert the pilot when it is time to land and recharge
the Lithium Polymer fl ight battery.
It is important that the pilot land the helicopter as
soon as possible after the LBW light comes on.
This will prevent the battery being damaged due to
over discharging.
