Welcome to PhantomPilots.com

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

P2V flips over on takeoff?

Discussion in 'Phantom 2 Vision Discussion' started by jiminyfixit, Jul 17, 2014.

  1. jiminyfixit

    Joined:
    Jun 2, 2014
    Messages:
    106
    Likes Received:
    3
    What would cause my salvaged/repaired P2V to instantly flip over as soon as I throttle up on takeoff? Could it be a defective MC? or one slower motor? I have a non-contact digital tachometer coming so I can test motor RPM balance. This was the first test flight since finishing repairs and updating firmware. I did all the pre-flight procedures; waited for GPS lock and calibrated the compass.

    I DID get some interesting video. :D

    Looking forward to more great "Pilots" input.

    Cheers,

    Jim
     
  2. 4wd

    4wd

    Joined:
    Mar 31, 2014
    Messages:
    2,532
    Likes Received:
    421
    Location:
    North York Moors
    I recall one similar where the shell was accidentally rotated 90 degrees when re-assembled after repairs.
     
  3. enseth

    Joined:
    Apr 2, 2014
    Messages:
    67
    Likes Received:
    0
  4. jiminyfixit

    Joined:
    Jun 2, 2014
    Messages:
    106
    Likes Received:
    3
    The shell halves are OK, (thanks 4wd), but I DO detect a slight difference in front to back RPMs when tilting. Enough to make me pull the halves apart and check my M1 plug. Thanks enseth for the link. It's funny how you miss posts when you don't have that particular problem 6 days ago. Thanks guys!!!
     
  5. jimdenburg

    Joined:
    Jan 21, 2014
    Messages:
    268
    Likes Received:
    3
    Location:
    Mukwonago, WI
    If that doesn't take care of the problem, you might want to check the prop balance. I had the same thing happen once after putting on "new" props. They weren't the original DJIs but the aftermarket XOXOs, and it turned out they were so horribly balanced that I couldn't get off the ground without tipping.
     
  6. jiminyfixit

    Joined:
    Jun 2, 2014
    Messages:
    106
    Likes Received:
    3
    Unfortunately I was using my brand new dji props that I had balanced perfectly. Nicked 1/4" off two of them, even WITH prop guards. Tall grass CAN bite. Will test fly with balanced XOXOs next time. Waiting for digital tach to check RPMs before test flying again. Loved the "flipper" vidoes.
     
  7. gunslinger

    gunslinger Moderator
    Staff Member

    Joined:
    Nov 3, 2013
    Messages:
    2,722
    Likes Received:
    497
    Location:
    Least Coast...
    You're going to balance XOXOXO props? Quick... what brand of tape are you going to use... I'll buy stock !!!! :lol: :lol: :lol:
     
  8. jiminyfixit

    Joined:
    Jun 2, 2014
    Messages:
    106
    Likes Received:
    3
    Gunslinger;

    I actually sanded material off the thick/heavy side instead of using tape. The ........props are actually several grams lighter than the dji originals, but, as you know, are NOT precision molded. Inferior tooling. (I used to be a plastics mold maker, years ago).

    BTW, NICE website!!!