CS 8 x8 random twitches?

Discussion in 'Cinestar 8' started by Holger Göhr, Sep 19, 2014.

  1. Holger Göhr

    Holger Göhr New Member

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    Hello everyone.
    We got a CS 8 in x8 configuration with
    MK 2.5
    MK double quad 3.5
    Kde 4012 motors
    17" props.
    With 16000mAh battery and a 2kg camera dummy It flies nicely in no/ low wind, no problems at all.
    But if the wind comes up and especially if we up the dummy weight to about 4 or 4.5kg it has short occasional twitches.
    I don't think it's the normal PID settings as the where all flown to tune them (poti on remote) and we have since re tuned them to mo avail.
    It's also not a swinging or vibrating, but more occasional twitches, especially when the copter has to compensate to a strong gust or or yeah, heavy weight.
    It feels a bit like the it comes from regulating the motors. Like the active brake is slowing a prop quite strongly and that transfers some torc into the copter? Not sure about that. But I have done some copters in my time and never seen anything like that.
    Any ideas? I am at my wits end and really don't know.
    Any help will be appreciated..
     
  2. Steve Maller

    Steve Maller UAV Grief Counselor

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    Patrick from KDE told me to use 16" props for the 4012 motors, not 17".
    I use 16" on my 4012 powered X8. They work great.

    As for the twitches, are these when flying manual or with AH and/or PH?
    What firmware are you running on the BLs?
    Do you have a GPX file?
     
  3. Holger Göhr

    Holger Göhr New Member

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    Firmware is 1.08c

    It happens in manual and AH/ GPS.
     
  4. Holger Göhr

    Holger Göhr New Member

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    I might try to get some 16" and try that..

    Any other ideas?

    Thanks for your reply Steve:)-)
     
  5. Ozkan Erden

    Ozkan Erden Distributor

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    Holger, can you post gpx file and a video if possible?
     

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