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Dont launch near manhole covers....lesson learned

Discussion in 'Pro/Adv Discussion' started by dtviewer, Jun 12, 2016.

  1. dtviewer

    Joined:
    Jul 24, 2014
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    Went to go fly today and figured I'd go fly over water. The spot I went to is at the end of an old parking lot. Right by the water there is a 10x10 foot triangle of grass. I placed my P3A there and kept getting a compass error...'contact DJI if it persists'.
    As I was fighting that sinking feeling in my stomach I decided to try a compass cal...didn't help. On top of the fear my phantom would have to be sent in for repair, there was also embarrassment as 2 sheriffs happened to be watching as I was standing there staring at my bird.
    Finally...a thought hit me. Maybe the big, very solid and old looking manhole cover about 8 inches away has something to do with the problem?
    Yep...that was it! Moved the phantom about 4 feet away and no more error and it started right up!!
    After that it flew flawlessly through 3 batteries. And it seemed to amuse the sheriffs for a while as they watched it fly before they got called off.

    BTW, don't know if my image transmission freeze last weekend was because I had set the vid camera to 2.7 or if it was just a fluke but I had no transmission problems at all today (I'm on 2.8.0) I did set the camera back to 1080 before flying today.
     
    Mark The Droner likes this.
  2. Zzyzx

    Joined:
    Feb 18, 2016
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    Location:
    Beaverton, OR, USA
    Yeah, I tried taking off from a nice flat patch of cement near a bridge by the river. It had a manhole cover on it, too. The Phantom was really unstable just on the initial lift off and hover. Set it down right away, and then realized the cement structure was a vault for some serious power lines that were strung under the bridge and came underground right there. I bet there was a ton of wonderful EMI coming off all that!