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Motor sound - when turned off...

Discussion in 'Phantom 2 Discussion' started by Judderman, May 15, 2014.

  1. Judderman

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    Hi All,

    Recently had my first crash - total pilot error. I considered myself okay until this point!

    So the phantom landed on to concrete (ouch) directly onto the rotors from a few feet up. It flew perfectly straight after, no damage to the gimbal or anything like that.

    However I've become paranoid now, and wanted to run this by the forum - when I spin the motors (when it's off) two of the motors make very little sound, and two make a sort of clunking sound. I can't describe it - here's a video. Remember, front two motors are OK as far as I can tell, rear two are making a different sound. It flew fine straight after the crash.

    https://www.youtube.com/watch?v=dhCcmeYeudw

    I'm scared to fly it again until I replace the motors - if that's what is recommended.
     
  2. N017RW

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    It's really hard to tell but great job on the video post.

    You may have 'flat spotted' a bearing or two upon impact.

    If you have no vibration then I don't believe you have a bent shaft.

    Another test would be to fly for a short bit and compare tempertures.
    Compromised bearings would likely increase temperatures from friction itself and the added energy required to overcome it.
     
  3. Judderman

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    Thanks for your response. There's zero vibration bit I've ordered two new motors as a precaution. I'll report back my findings soon!
     
  4. Judderman

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    Another thing has just occurred to me - after I've replaced the motors, reconnected all the cabling, gimbal etc, is there any kind of calibration I would need to run? I suppose it could do no harm.

    Anyone know if the calibration procedure is different for a motor replacement?