Octocopter height gain when yawing

My octocopter with APM1 and oilpan running 2.7.3 software has a quite alarming power surge in the motors when yawing. Yawing either way results in a an audible surge of the motors and quite rapid height gain. The surge stops and the rate of altitude gain slows if you hold the yaw command on. 

I had hoped these two threads were going to spread some light on the issue but they seemed to stop as things started to get interesting. 

http://www.diydrones.com/profiles/blogs/yaw-control-esc-linearization-and-hover-reconstruction

http://www.diydrones.com/profiles/blogs/stability-patch-for-motor-max-and-min-and-yaw-curve

Has anyone else experienced this problem and if so what was their solution?

Peter

 

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Replies

  • I reduced the YawRateP from 0.25 to 0.12 and that improved things considerably.

    Thansk for the very quick response, Peter 

  • Graham, thanks for responding, I don't feel so alone. 

    Jason, I will try reducing yaw rate P. Am using the default value and compared with my quad have much longer arms.

    Peter  

  • Developer
    Your yaw rate P value is too high.
    Jason
  • Moderator

    My quad does the same (right at the start of the yaw) but I've just got used to it, the alt gain for me is only about 0.5-1m and it seems to come down slowly after the yaw stops.

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