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Sometimes she flips for no reason.

Discussion in 'Phantom 2 Vision + Discussion' started by neoneo, Jun 8, 2014.

  1. neoneo

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    Sometimes my P2V+ just flips upside down for no apparent reason. I have her on film twice doing it. Once was right at the start of RTH activation. I lost line of sight and didn't even know she did it till i saw the film. The second time in that flight was when coming down to land. she dropped a good 100 feet. no prop wash. i was moving forward with a little descent. is anyone else having this problem. I'll post the film when it's done uploading to youtube.
     
  2. neoneo

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  3. BlackTracer

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    Everything happens for a reason!! Lol. Except for that!!! WTF????
     
  4. Mal_PV2_Ireland

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    How old is it? Man I wouldn't be flying that thing again, I'd be sending it back with a video to where you bought it and be wanting a brand new replacement. You couldnt have been much lower for you to be able to pull out of that flip. Faulty Pv2+
     
  5. neoneo

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    i bought it in at the end of april.
     
  6. mr_3_0_5

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    From the video it looks like the right rear motor had a hiccup
    I'd look into that
     
  7. Diirk

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  8. Mal_PV2_Ireland

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    Dont think so Diirk,
    As Mr305 said it could be a motor temporarily failing but I have a feeling its software related.
    Looks like the flight controller had a brain fart.
     
  9. Doono

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    I agree with Mal, get it back to your dealer, you still have an undamaged Phantom and recorded evidence. Take it back smashed up, and it may be more difficult to prove product failure.
     
  10. Dirty Bird

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    I am going to third this. Contact your dealer or DJI, show them the video, and get her back for a checkup before something catastrophic happens.
     
  11. ToThePoint

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    Nice video.
    And hence we are back to the equipment blaming.
    You've done @ least 3 major mistakes.

    1) Was flighing in high winds.
    As you return you can see clouds shade in the river, man there was a lot of wind.

    2) Flighing behind a building isn't done because you will lose connection ! The connection only stays in in LOS.
    If you had gained altitude it wouldn't had to be a issue.

    3) Guess what, in winds like that a building that huge creates vortex. And it was also there in front of that building ( wind viewing point, or behind for your LOS )
    Also air is matter and if it encounters a obstruction huge pressure shifts are taking place. Well shifts big enough to get that bird into trouble.
    The flip happened the moment you were near that building !
    Try this, stick your head out of a riding car thats rolling on a highway, then maybe you get the picture that it was not due to any failure but pilot error.
     
  12. DronePilot

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    Have to say. I agree with ToThePoint.

    I also think that although the view is beautiful, what do you think would happen if your phantom should completely fail and crash down onto one of those busy streets?
     
  13. ToThePoint

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    It just popped up in my mind that the hight gaining that wasn't suppose to happen did happen in fact due to the air that tried to force itself around and over the building. That was your luck or when the RTH was initialized also the hight was recorded and the software did gain hight because it noticed it was way down. But to be sure for that you need to get a insight into the program and how it would react in this case.
    Anyway i am happy that the bird did survive its ordeal because it was pushed to the limit and the evidence to that is when the motor arms are in the picture when its hovering.

    End of lecture LMAO.
     
  14. Phantomdee

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    Was the second flip on the way backdown also caused by a lot of wind guys?
     
  15. Jeremyconk

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    Interesting post....

    It also appears your gimbal is not level..... The horizon is not level along the ocean....
    It could be due to extreme wind, but something seems off...
     
  16. ToThePoint

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    Yes it was. You can argue that it didn't happen on takeoff. Indeed it didn't but the bird followed a different fly path. On take off it gained distance an then altitude.
    When it can back it was the other way around.
    As wind bumped into that building it got compressed leaving on the other side ( were the bird tried to land ) less dense air. Take on top of that the rotating from aside on over the building top and you have a nice mixture that spells trouble.
    You can experience that phenomena first hand.
    Drive on a highway and let a truck overhaul you.
    The front of the truck will push you away from it as the back end will suck you towards the truck.
    There is no difference between the truck and that building due to the fact that its the air that moves, either by windspeed or the speed of a truck.
    Air doesn't act different when it bumps onto objects.
     
  17. Mal_PV2_Ireland

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    After reading To the points comments and re watching the video I have to completely change my mind and agree. This is totally down to high winds around these tall buildings, I only saw the speed of the clouds passing over the water. The reason your phantom raised up over the building at the last second is very simple, it was caught in an up draft. The reason the camera is tilted off the horizon is because the phantom is flying at such a severe angle to combat the wind. How fast was it blowing on the ground?
     
  18. pyrophantom

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    Are you guys allowed to fly in that kind of environment ?

    We cant do that in the UK and I would be crapping myself if I was trying to fly inbetween such structures :shock:
     
  19. Mal_PV2_Ireland

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    They live in the lawless wild wild west ;)
     
  20. Mori55

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    I'm a Ironworker and I put the tower crane up on that building and numerous other buildings in AC , I also worked on the Revel ..
    Plus we almost lost a 320' tower crane on NY ave due to out of no were wind gust. It almost blew it off the jacking pins we had to chain it down with chain comealongs , scary day.
    Did you know that Brigatine is considered the windiest place in the US ? That building we're you flipped is right across the inlet from there. I worked on the Brigatine bridge for a year and I can tell its windy and gusty especially picks up around 9 or 10 am.
    Another thing is , it may be a little windy on the ground , but as soon as you get above the tree or building line it get windy.
    I saw some of your other video on you tube. You seem to fly over a lot of densely populated areas. Like the Deptford mall , Eagles stadium in Philly , AC casinos ,and by the cross keys airport. Don't you get nervous ? Not trying to bust on you , but what if something happens ? I've been flying RC for along time and **** happens with these things. I've been to those areas , lived in south jersey my whole life and know how populated these areas are.