Take off's always unstable - but flight is smooth?

3691052285?profile=originalHi all,

Just looking for a bit of confirmation - every take off is fraught with problems, with wild pitching one way or the other (it's mostly to the left, it should be noted). I often need to put in a bit of stick to get it in the air.

However, once it's there...no problem, Stable and smooth as anything.  As can be seen from the pic; a start up, a slow spool to almost-hover, until I punch lightly it up into the air, and then it all smooths out.

Is this a motor problem brewing? Or does the gradient affect start up motor speeds (it's only a slight gradient)?

Logs attached, just in case.

In a possibly related problem, I'm seeing a slight side-to-side yawing action in all flight modes. Will upload video of it shortly.

2013-08-21 21-07 1.log

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Replies

  • hello.......its due to ground effect its not a big issue 

    regards,

    UNMANNED ENGINEERIA 

  • Hello Euan,

        I am not an expert about this but from my experiences the I value of the PID settings may be the configuration you should play with. My hexa was taking off badly and flying smoothly as yours. After changing the I value, now my hexa taking off very well. I hope it will help you

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