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Phantom 3 Std. Bad motor causing high pitched 'whistle' sound/ Normal?

Discussion in 'Standard/4k Discussion' started by Squirrel!, May 12, 2016.

  1. Squirrel!

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    I posted a video here awhile ago (can't find the thread now) and asked if the high pitched 'whistle' sound was 'normal' or not. I got one guy that said his does the same and others ignored it, meaning (I guess) that theirs doesn't make the same noise.

    Anyhoot, it turns out that I do have a bad motor (bearing). Just going to replace it as I couldn't ship it back for the $13 I paid for the motor. Not to mention DJI would likely charge me for the repair anyway.

     
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  2. Mark The Droner

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    Nice lawn! Thanks for posting
     
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  3. Squirrel!

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    Thanks! Here's a better lawn pic... ;)

    4 (Custom).JPG
     
  4. The Springs

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    I posted a short time ago asking the same question ,although mine only did it after I flipped over on the ground .I didn't get a reply either .Looked at footage of how to replace it .Getting the shell apart isn't easy but the main decision seems to be a choice between re soldering to the board or cutting the wires and soldering to them. I favor the latter .Mine ran smooth initially so yours should be I assume..
     
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  5. The Springs

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    I forgot to say I determined which motor it was by getting my son to increase the speed while I tilted the P3 to each of the four sides . Spinning them by hand revealed little. You may have done this sort of test
     
  6. Squirrel!

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    I concur...I plan on splicing the wires. Hell, I was a splicer for 30 years as a lineman, I think I should be able to handle 3 motor wires. Will also be using shrink boot over the splice.
     
  7. Squirrel!

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    My motor has lateral movement, slight as it is.
     
  8. Mark The Droner

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    You might also consider something like this (I saw somebody use something like this to connect his uav motor wires on a video a while back).

    [​IMG]
     
  9. Squirrel!

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    I don't care for those. The set screws have a nasty habit of loosening up:confused:...but thanks for the suggestion!:cool:
     
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  10. The Springs

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    Apparently the wires have a coating that has to be removed with something like wet and dry sandpaper before soldering also
     
  11. Squirrel!

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    The replacement:
    DSCN8117.JPG DSCN8116.JPG
     
  12. Mark The Droner

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    Thanks for the info!
     
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  13. Olsen Petrus

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    I have this kind of sound since the first day I got the p3s, there is no problem with it
     
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  14. Squirrel!

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    I have had this sound since the opening of the box as well. It is caused by a bad motor bearing. Close to 200 flights and over 60 miles of flying, I'm not going to wait for it to stop mid-air.
     
  15. Olsen Petrus

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    I thought brushless motor not going to have this kind of bearing problem
     
  16. Squirrel!

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    Brushless or not, has nothing to do with the bearings.The motor still runs. I can still fly it. But the whistle has gotten progressively louder than when the video was made. As has the stability issue.

    When I made the video, I set the P3S to hover and I went back inside to get the camera. It stayed in place as it should have. It won't do that now.My only conclusion is that the motor, with lateral play, plays a huge role.
     
  17. mikep2323

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    Can you keep us posted? Mine does that as well but I think it's normal. I sent a video in to drone nerds and they said that's the noise it makes. My friend has a p3s and his made the same noise and I've seen quite a few videos with the same noise. The whistling. I to thought that it wasn't normal and got a little panicking and started asking around and that's when I saw other videos of people posting vibration videos and in all of them I hear the same whistle. I'm curious though if it stops when you change the motor.
     
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  18. mikep2323

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    Here is a you tube link of mine that I sent to drone nerds.

     
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  19. AgnotGT

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    I wonder if they make the bearing noise with the props removed?
     
  20. Squirrel!

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    o_OWonder no more! ;) No, they don't make the whistle noise with the props removed.