Welcome to PhantomPilots.com

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

Fly away, crash and spiral down to earth :(

Discussion in 'Phantom 2 Vision + Discussion' started by kirbinster, Sep 22, 2014.

  1. kirbinster

    Joined:
    Aug 13, 2014
    Messages:
    97
    Likes Received:
    0
    Location:
    Morris County NJ
    Kind of a windy but clear day. Set bird up on box to take-off, got GPS lock, recorded home position and started my flight. She was drifting some but had a GPS lock, then after about a minute or less she lost the GPS signal; switched to ATTI mode and decided to bring her in. Was a little hard to control in the wind, then all of a sudden she took off up and backwards. I pulled control sticks to make her go down and forward but she just took off with no control up and backward. Fortunately she was caught by a big tree across the road before she took off to never been seen again. Went into a death spiral and landed on her back with leaves caught in the props. Turned her off and put gimbal guard on and figured she was a goner. Went back to my car and tested her out on the ground and camera and bird work perfectly. Lucky me. No clue why she took off. Perhaps I'll post the video of the death spiral and she spiraled down from the tree.

    [youtube]http://youtu.be/Er9KHKNnewI[/youtube]
     
  2. mickey78

    Joined:
    Aug 11, 2014
    Messages:
    69
    Likes Received:
    0
    Very interesting. Since you were in ATTI, it's defiantly not the GPS who was acting up, or at least it is less likely.
    Wild guess: wind blowing too strong? Were you very high?
     
  3. kirbinster

    Joined:
    Aug 13, 2014
    Messages:
    97
    Likes Received:
    0
    Location:
    Morris County NJ
    No it was only about 20 or 30 feet up when it started to go. I flipped the switch to ATTI but I don't think the bird reacted at all. After it was all done I checked the find my phantom and it showed a last position of just before it crossed the road. There was no reaction to the controls at all as it was flying away.

    [​IMG]

    It crashed into a tree at the back end of the gravel parking lot on the other side of the road.
     
  4. mickey78

    Joined:
    Aug 11, 2014
    Messages:
    69
    Likes Received:
    0
    Wow... was it your first time switching to ATTI?
     
  5. itchybeard

    Joined:
    Aug 23, 2014
    Messages:
    176
    Likes Received:
    0
    Location:
    Bedfordshire, UK
    Whoa nasty!

    An RC controller calibration and an advanced IMU calibration of the bird before you take her up again, eh? It might even be a good idea to take the lid off and check the connections inside if she's been rattled. Sounds like you were very lucky there, Kirbinster.
     
  6. zir6rm

    Joined:
    Sep 12, 2014
    Messages:
    2
    Likes Received:
    0
    We have been having very serious solar flares the past week. They can badly interfere with radio communication. I have kept my Phantom on the ground.
     
  7. flyNfrank

    Joined:
    Feb 1, 2014
    Messages:
    4,214
    Likes Received:
    911
    Location:
    Indy, USA
    Hey Kirb, when even just a little windy,....stay away from ATTI mode! You have to think of atti mode as a balloon without brakes. It's much safer to remain in GPS mode.
     
  8. Madwak

    Joined:
    Apr 2, 2014
    Messages:
    291
    Likes Received:
    1
    Seems a bit of a coincidence that instead of going down and forward it went up and backward (the exact opposite) are you sure you didn't have a brain fart in you're panic and mix the sticks up? :?:
     
  9. kirbinster

    Joined:
    Aug 13, 2014
    Messages:
    97
    Likes Received:
    0
    Location:
    Morris County NJ

    Thanks, brought it home and did an advaced IMU calibration as I figured it might have gotten knocked out of kilter. Also opened her up to check everything and make sure things were still connected.
     
  10. kirbinster

    Joined:
    Aug 13, 2014
    Messages:
    97
    Likes Received:
    0
    Location:
    Morris County NJ
    No I have flown it in ATTI before with no issues, once I switched to ATTI it seemed like it had already lost control and did not do anything other than keep going up and away even with sticks pulled to come down and forward :(
     
  11. kirbinster

    Joined:
    Aug 13, 2014
    Messages:
    97
    Likes Received:
    0
    Location:
    Morris County NJ
    No brain fart, but I can understand why you might assume that. When I saw it was not responding I switched to try to send it up higher to try and clear the tree but that did not seem to change its rate of climb either. It just did not react at all to control input.
     
  12. RedBaron

    Joined:
    Jul 5, 2014
    Messages:
    132
    Likes Received:
    0
    My crash was very similar to yours. It has happened twice. I also switched to ATTI mode but did not get any response. It was like the controller instantly shut off. Would be nice to find out what is happening. I see there are others that have had similar mishaps. I personally do not think it is pilot error, vortex problems or even the wind.
     
  13. Panamon Creel

    Joined:
    Jul 31, 2014
    Messages:
    229
    Likes Received:
    0
    Location:
    Central Mexico
    What's the status of your TX batteries, brand new? used a few times? been in there for some time?
     
  14. kirbinster

    Joined:
    Aug 13, 2014
    Messages:
    97
    Likes Received:
    0
    Location:
    Morris County NJ
    They are the original batteries from DJI and have maybe 50 minutes of usage on them.
     
  15. victor

    Joined:
    Aug 19, 2014
    Messages:
    24
    Likes Received:
    0
    Something like that kinda happenned to me too once. It very breifly(thank god) went into weird spasm/attitude and looked like I lost control input, so I switched to manual and brought her in with some struggling. I recalibrated compass and it never happened again.
    I assume it was due to either the compass or just temporary 5.8GHZ radio interference!
    I would re-cal your compass and watch out for rf interference!!
     
  16. mickey78

    Joined:
    Aug 11, 2014
    Messages:
    69
    Likes Received:
    0
    Are you saying you lost it the second you switched to ATTI?
     
  17. rrmccabe

    Joined:
    Jul 2, 2014
    Messages:
    1,647
    Likes Received:
    358
    Location:
    Ankeny, Iowa
    Almost sounds like it lost 5.8 connectivity while this GPS was going in and out (which you noticed) and it raised to 60' and lost GPS again and got caught in wind in ATTI mode. Seemed like drift in wind and not like it took off.

    GLAD it survived !
     
  18. kirbinster

    Joined:
    Aug 13, 2014
    Messages:
    97
    Likes Received:
    0
    Location:
    Morris County NJ
    No, it just started going when it lost gps so I switched it to ATTI to try to stop that and take control, but it never gave me control back. It never actually went into ATTI mode.
     
  19. ealt

    Joined:
    Sep 21, 2014
    Messages:
    5
    Likes Received:
    0
    You're so lucky it did not went to the water direction. Hope you can update us if you managed to find the root cause...
    Cheers
     
  20. rrmccabe

    Joined:
    Jul 2, 2014
    Messages:
    1,647
    Likes Received:
    358
    Location:
    Ankeny, Iowa
    Off topic but nice lake and beautiful country where you are. I had a customer in Mine Hill near the lake you were at. Really enjoyed the drive.