Trim RC for Tricopter ?

[wiwitop]

hi,

I built my first tricopter (and RC vehicle) from various parts :
Turnigy Talon
Turnigy 1200kV
HK ESC 30A
Crius AIO Pro (clone)

I uploaded multiwii 2.3 without problems.
I managed to connect it to multiwiiconf.
Gyro/acc, mag, baro, ESC are calibrated and the sensors and the Yaw Servo seem to react normaly.
The radio controller was trimmed to get 1500 for the mid ranges of sticks.

When I take off (in Acro mode) my Tricopter drifts to front-left. He doesn't rotate so I suppose it's not a problem with the yaw.

What am I suppose to do in that case ? I thought that the accelerometer was supposed to compensate this.
So my question is perhaps stupid, but should I use the trim buttons on my Radio Controller for calibrating Acro Mode ?

thx.

[Hamburger]

in acro mode nothing prevents drifting.
in level mode you can do calibration to prevent this for perfect conditions (no side wind effects).
With wind, the pilot must become active

[wiwitop]

Thanks a lot for your answer.

I'm now working to swap mode 1 / mode 2 on my Turnigy 9X. I'm right handed and I made a mistake by buying a mode 1. That should help me a lot.

Secondly, I broke the yaw servo. I suppose it's because I was not able to change the servo travel and did not undestand how important it could be.