Welcome to PhantomPilots.com

Sign up for a weekly email of the latest drone news & information

Stress crack prevention

Discussion in 'Pro/Adv Discussion' started by JamesG2571, Apr 22, 2016.

  1. JamesG2571

    Joined:
    Mar 1, 2016
    Messages:
    210
    Likes Received:
    91
  2. Mark The Droner

    Joined:
    Aug 26, 2015
    Messages:
    4,015
    Likes Received:
    1,172
    Location:
    Brookeville, MD, USA
    Most people don't get stress cracks although it seems to be a big problem since we read about them so much.

    If it was me and I had a new P3, I'd back out all the wing screws an eighth of a turn and be done with it. MHO
     
    JamesG2571 likes this.
  3. alokbhargava

    Joined:
    Sep 28, 2015
    Messages:
    5,144
    Likes Received:
    1,660
    Location:
    San Francisco, CA
    Though there is no proof that such strong arm supports prevent stress cracks but many have expressed satisfaction and claimed good results. There seems to be no harm using them. You can use them it's your choice. There are many suppliers for such parts and the well known name is UVBits.

    The most critical part in using these parts is the length of screws. If the length of screws provided by the vendor are longer than required they bite into motors and are known to damage motors, so be careful.
     
    JamesG2571 likes this.
  4. JamesG2571

    Joined:
    Mar 1, 2016
    Messages:
    210
    Likes Received:
    91
    Thanks for the responses! I will unscrew them ever so slightly and just keen an eye on them.
     
  5. m0j0

    Joined:
    Dec 26, 2015
    Messages:
    1,533
    Likes Received:
    530
    I had them.. I did nothing to prevent it and flew the crap out of my P3p. Until the crack was about a half an inch. I sent in a ticket and shipped it under warranty. The fixed it found that a motor was going bad so they fixed that too... whole process from time I shipped it will be about 9 days.


    Sent from my iPad using PhantomPilots mobile app
     
  6. Mark The Droner

    Joined:
    Aug 26, 2015
    Messages:
    4,015
    Likes Received:
    1,172
    Location:
    Brookeville, MD, USA
    I wonder how they found a motor going bad? I'd love to have a tool that would tell me that.

    Back...
     
  7. m0j0

    Joined:
    Dec 26, 2015
    Messages:
    1,533
    Likes Received:
    530
    Well because when they fired it up they could here the bearing rattle I suppose. I know I could witch was one of the main reasons I sent it in.
     
  8. Shep

    Joined:
    Dec 24, 2015
    Messages:
    110
    Likes Received:
    46
    Location:
    Phoenix
    I put these on and have only flown my P3p once since. But that is my concern also - they they might damages the motors somehow. The one time I flew the motors seemed to be hotter than usual, but it is the middle of summer on AZ. I suppose the only solution would be to take the off and re-measure the old take off screws.
     
  9. gavinh

    Joined:
    May 5, 2016
    Messages:
    6
    Likes Received:
    1
    I own both the common 3D printed version and the aluminum ones. I contacted DJI about warranty if they are installed, and they stated that even if the crash is deemed non pilot error that the arm reinforcements would void the warranty. My arm reinforcements have thus stayed in their package. I have heard that DJI is very responsive with replacing the shell should you get stress cracks.
     
  10. kirk2579

    Joined:
    Jan 13, 2015
    Messages:
    1,344
    Likes Received:
    263
    Location:
    Girard. ohio

    like others I also loosened and then retightened screws to just firm.

    I also added a tywrap at each arm. I don't know if they help but cant hurt(many hours of flying since installed).
    I figured the extra pressure may help alleviate and spread some of the twisting forces when flying.
    so far so good
    phantomtywrap.jpg