User Manual
You may also need to use a little TX trim to stop the helicopter drifting.
If you are using the FM tail gyro,
You will first need to switch it to normal mode with a gain value of about 25,
either with your TX if the green wire is connected or by using the slider on the
tail page in Helibal
if the green wire is disconnected.
Once in normal mode the tail servo will move to center, set the tail slider so
that it is a little off center ( this is to counter the rotor torque)
Test fly and slide the servo along the boom until the helicopter will hover
without stick input or trim. ( RATE MODE )
Set the travel so that the tail slider and servo do not bind or buzz .
switch back to HH and set the best gain.
You may need to use a little TX trim for best performance.
Note, when you switch to HH the tail servo will drift to one end, this is normal
and it will sort itself out when you lift off into a hover, help it a little with the
rudder stick.
Note, If the blue wire is connected stabilization gain is controlled and
adjusted in the TX and adjusting it in Helibal will have no effect, if it is
disconnected stabilization gain is adjusted in Helibal.
The green wire for gyro gain works in the same way. Connected,controlled
by TX disconnected controlled in Helibal.
I wanted to add that I use Align PU Gel and velcro strap to mount the gyro. I
have found it quite good for isolating against vibrations but does not hold the
gyro very well,hence the velcro strap that is supplied with the gell.
To test that FM is not being effected by vibration. Power up in position mode
with gain at factory preset +70, tip heli and check that the swash is reacting
correctly, moving in the opposite direction to correct the tip.
Pin the heli down so it cannot take off and run it up to speed. The blades and
flybar should remain level,
if they tip then you have to much vibration and flying the helicopter will result
in a crash.
Do not forget to save your cfg file after you have set up FM.