Welcome to PhantomPilots.com

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

p3A take off flew itself and crashed

Discussion in 'Pro/Adv Discussion' started by quasimodo, Oct 7, 2015.

  1. quasimodo

    Joined:
    Jul 30, 2015
    Messages:
    55
    Likes Received:
    5
    Hi there. I have another issue to highlight. Maybe this related to the 1st issue. Last nite i decided to discharge. Since the stock battery i suspect problem i hover as close as i can so that anything happened it will crash softly.reach to 30% level low warning so it prompt me to return home. So i cancel it.but it insists to land on its own....so i hover again and as the battery reach to 12% i land the craft and let the motors running at 10%.i was waiting to reach 8% to turn off the craft. But as it reach 10% and the alarm is on suddenly with no input on controller...the craft take off like 0.2m and fly itself and crashed!!!!luckily it crash on grass not on road...
    Whats happened??????this is so dangerous...if my kid around there for sure the craft will hit him....
    Dji please resolve this problem....i think it got to do with the battery i guess.with only 17 times of charge the battery life already reduce to 98%.
    For the 1st issue like i said from the log message says error code 96.
     
  2. Meta4

    Meta4 Moderator
    Staff Member

    Joined:
    Jan 8, 2014
    Messages:
    7,729
    Likes Received:
    3,448
    You shouldn't leave a Phantom running on the ground with props on.
     
    Jbundy63 likes this.
  3. rnst2

    Joined:
    Sep 28, 2015
    Messages:
    7
    Likes Received:
    1
    but he just landed
    then waste energy
    then it's soul decided to go to hell
    this is what happened, right?
     
    Chris Grazioso likes this.
  4. quasimodo

    Joined:
    Jul 30, 2015
    Messages:
    55
    Likes Received:
    5
    Yup...thats sums all up. If i hover it higher for sure it wanted to move itself and crashed heavily so thats why i land it and let it sits there while it drain to 8%. I want to discharge the batt.funny thing is it moved by itself...'rise of the machine' perhaps....man it freaks me out...
     
    #4 quasimodo, Oct 7, 2015
    Last edited: Oct 7, 2015
  5. Meta4

    Meta4 Moderator
    Staff Member

    Joined:
    Jan 8, 2014
    Messages:
    7,729
    Likes Received:
    3,448
    Leaving it running on the ground, you risk the altimeter drifting causing the Phantom tp think it's flying again and taking corrective action or attempting to return to home.
    When you land you should shut off the motors.
     
  6. quasimodo

    Joined:
    Jul 30, 2015
    Messages:
    55
    Likes Received:
    5
    Mmmm....sounds logical...If i wanted to on the motor on the ground then i must take off the props?
     
  7. msinger

    Approved Vendor

    Joined:
    Oct 30, 2014
    Messages:
    18,890
    Likes Received:
    5,564
    Location:
    US
    It would be better to take the props off, turn your Phantom on (with the motors off), and let it run until it shuts off. Ideally, you'd want to do this in a cool place so it does not overheat.
     
  8. quasimodo

    Joined:
    Jul 30, 2015
    Messages:
    55
    Likes Received:
    5
    thats the safest way for sure but how long will this take to drain out the batt?.have anybody done it?
     
  9. Bryce

    Joined:
    Jun 13, 2015
    Messages:
    445
    Likes Received:
    95
    A long, long time. There is no load on them.
     
  10. quasimodo

    Joined:
    Jul 30, 2015
    Messages:
    55
    Likes Received:
    5
    So then i have time to get a burger or 2...or i could record while it sits there right?it could make it faster to drain the batt.
     
  11. Chuck Young

    Joined:
    Jun 25, 2015
    Messages:
    621
    Likes Received:
    192
    Or you could fly up 100 feet set POI fly out 50 feet and go around and around at 20 mph, record video so you can play it back and make all your friends throw-up. In a little bit it will RTH cancel and fly around a little more it will RTH and battery will be at 10%
     
  12. quasimodo

    Joined:
    Jul 30, 2015
    Messages:
    55
    Likes Received:
    5
    The reason i didnt fly the craft high coz i suspect that my batt is goin to die...coz i notice ive charge more than 20 times but in app it shows 17.and when look at the cells...cell 1 and 4 drain more than cell 2 and 3.2 and 3 drain consistently but 1 and 4 unstabil.batt life shows 98%.symptoms are there...but after a full recharge battery life back to 100%. Is this normal?
     
  13. eyecon82

    Joined:
    Oct 18, 2014
    Messages:
    616
    Likes Received:
    67
    There are 2 battery level warnings. A first and a 2nd one. Maybe the 2nd one makes it RTH no matter what, while the first warning allows you to cancel the rth

    Sent from my SM-G900P using Tapatalk
     
  14. Dome

    Joined:
    Apr 24, 2015
    Messages:
    480
    Likes Received:
    96
    Location:
    Italy
    This can be the issue, right... It's better to wait just first alarm and then land the P3 soon after.

    To discharge a 100% battery without running motors on, it takes 24h and more...
    I let the motors run, with no propellers, to discharge last part of battery.
     
  15. Poundofnuts

    Joined:
    Jul 6, 2015
    Messages:
    208
    Likes Received:
    34

    You should only discharge to 8% around every 20 cycles, and I personally wouldn't do it with the props on. From what I've read, it's by design and the phantom has two low warning levels. The first one you can set in the app to sound alarm and warn you of a low battery, by default I believe it's 35%, a good point to start bringing the bird in close or home. The second one will automatically land the bird and I believe that level is 8 or 10%. It sounds like you let yours hit the critical low and it attempted to land itself but for some reason it didn't just descend but maybe tried to perform a RTH before descending. Just to be safe, if you're doing the complete discharge every 20 cycle thing, I would land the bird and remove the props at 15%, and then just let it sit while turned on (without engaging the motors) and let it drain the remaining power to 8%. It won't take long. Engage the simulator and it will even drain a little faster.
     
  16. brianb87

    Joined:
    Aug 21, 2015
    Messages:
    788
    Likes Received:
    148
    It was at low battery level. Mine tried to land yesterday buy itself when my battery was in single digits.
     
  17. Justgregg

    Joined:
    Mar 14, 2014
    Messages:
    519
    Likes Received:
    119
    Location:
    Denver Colorado
    I will trade you a really nice RC boat fot that phantom!
     
  18. halfpipe

    Joined:
    May 14, 2013
    Messages:
    126
    Likes Received:
    6
    Location:
    Atlantic Coast Canada
    I'm not taking the props off. They are nice and snug and prolly stay like that.
    Taking them off and putting them back on ..repeat ....repeat might lead to issues
    Leave em on
     
  19. JKDSensei

    Joined:
    Jun 24, 2015
    Messages:
    1,511
    Likes Received:
    658
    Location:
    USA
  20. Meta4

    Meta4 Moderator
    Staff Member

    Joined:
    Jan 8, 2014
    Messages:
    7,729
    Likes Received:
    3,448
    No it won't ... you can take props of and put them on and take them off etc, etc.
    I've been doing it since April with the same props.
    Just don't over tighten them. They only need to be done up finger tight.