Trex 450 drifts left with a gy401

[TiFische]

Hi guys. Just rebuilt my trex after a crash. Now the tail does not want to hold in HH mode. Keeps drifting left (nose to right) once I hit full rpm. My gain on my futaba is already at 60%. Should I increase it?

[Super-Hornet]

Assuming u are running normal CW rotation heli...and since u said that it starting to turn to right when u increase collective, that mean your tail is getting more power when u increase collective. Thus, it sounds like u enable "Revo Mixing" instead.

SH

[TiFische]

Never thought of that.

Hmmm. Will check that and give it a try.

Assuming u are running normal CW rotation heli...and since u said that it starting to turn to right when u increase collective, that mean your tail is getting more power when u increase collective. Thus, it sounds like u enable "Revo Mixing" instead.

SH

[TiFische]

It works

SH, thanks it works great. I had stripped it down and set it up allover again and this time took the trouble to make sure the mechanical bits are properly set up before turning on HH. Yes the revo mix was on.

Many thanks

[Super-Hornet]

Glad u solve your problem.

Do take note that in Futaba TX, setting Revo Mixing to flat line IS NOT equal to disable Revo Mixing. U have to switch it to "Inhibit".
SH

[sLapshock]

HI GUYS,

i have a problem with my new built hk450gt with hk401b.

the tails rudder to the left (nose to the right)

my gyro gain is very low already at 17!

can i know whats the problem?