Plane Yaws when rolling

Posted by Damo on May 6, 2014 at 2:21pm

I have my arduplane setup with APM and the latest firmware. I have no modified any settings but i have performed all the calibrations. I have not flown yet. When i roll the plane the yaw also moves. This is in stabilize mode ? is there something wrong ?

I disconnected the APM and wired directy only the Reciever and everything works as expected so my transmitter is setup fine.

Any ideas ?

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Replies

  • 100KM
    Trung Nguyen May 6, 2014 at 3:27pm

    Check this parameter:
    Rudder Mix (ArduPlane:KFF_RDDRMIX)
    The amount of rudder mix to apply during aileron movement 0 = 0 %, 1 = 100%

    Range: 0 1
    Increment: 0.01


    oops, Tridge beat me to it. 'what he said'
    • Damo > Trung Nguyen May 6, 2014 at 3:40pm

      Thanks a million

  • Developer
    Andrew Tridgell May 6, 2014 at 3:27pm

    btw, I'd recommend you use FBWA mode, not STABILISE mode.

  • Developer
    Andrew Tridgell May 6, 2014 at 3:26pm

    I presume you mean the rudder moves? That is normal. The rudder is mixed with the ailerons to reduce adverse yaw and produce more coordinated turns.

    You do have to make sure it is moving in the right direction. Have a look at this:

    http://plane.ardupilot.com/wiki/arduplane-setup/first-time-apm-setu...

    and also check the KFF_RDDRMIX setting (which controls how far the rudder moves with aileron movement)

    Cheers, Tridge

    • Damo > Andrew Tridgell May 6, 2014 at 3:38pm

      Thank you very much

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