Welcome to PhantomPilots.com

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

Standard Two props run faster the two others on the ground

Discussion in 'Phantom 3 Help' started by YamaHu, Oct 16, 2016.

  1. YamaHu

    Joined:
    Oct 16, 2016
    Messages:
    25
    Likes Received:
    0
    so what happen yesterday ... I land and leave motors running at low speed and two of motors were running faster then two others which make drone flip on one side I notice that so I give more power and drone airborn but almost two props touched the ground. It was with GPS on.
     
  2. tcope

    Joined:
    Jan 29, 2015
    Messages:
    4,186
    Likes Received:
    1,684
    Location:
    Salt Lake City, UT
    Has itt always done that? Anything changed in the mean time? Any wind at the time? Was the drone level? I'd certainly do a an IMU calibration.
     
  3. YamaHu

    Joined:
    Oct 16, 2016
    Messages:
    25
    Likes Received:
    0
    Not always twice. Once outside second was I try to fly indoor. Not much wind. Level was pretty good I guess. I never done IMU calibration need to look for it.
     
  4. YamaHu

    Joined:
    Oct 16, 2016
    Messages:
    25
    Likes Received:
    0
    IMU is to calibrate camera not motors, right ? Maybe I'm wrong
     
  5. YamaHu

    Joined:
    Oct 16, 2016
    Messages:
    25
    Likes Received:
    0
    Now I know what I'm talking about .... that noise from motors I hear and wonder if it's normal ... high pitched 'whistle' sound
     
  6. Meta4

    Meta4 Moderator
    Staff Member

    Joined:
    Jan 8, 2014
    Messages:
    9,624
    Likes Received:
    4,701
    The IMU is the Inertial Measuring Unit .. all the sensors that help the flight controller make the Phantom fly.
    If your Phantom flies properly, everything is fine.
    Don't leave it idling on the ground for long.
     
  7. YamaHu

    Joined:
    Oct 16, 2016
    Messages:
    25
    Likes Received:
    0
    "Don't leave it idling on the ground for long." Interesting.... why not ?
     
  8. Meta4

    Meta4 Moderator
    Staff Member

    Joined:
    Jan 8, 2014
    Messages:
    9,624
    Likes Received:
    4,701
    Because there have been several cases of owners flying, landing and leaving it idling.
    Over time, temperature changes in the Phantom cause the barometer readings to make the Phantom think it's flying and it initiates RTH to try to get back.
     
    RodPad likes this.
  9. YamaHu

    Joined:
    Oct 16, 2016
    Messages:
    25
    Likes Received:
    0
    That make sense. I hope that was the reason. So better take off right after I start motors and after landing cut off motors is better.
    How about that noise "whistle" you think its ok ?
     
  10. RodPad

    Joined:
    May 20, 2015
    Messages:
    3,793
    Likes Received:
    562
    Location:
    Pacific,NorthWet, 97031
    WOW,

    @YamaHu, also feel how hot the camera gets, even hotter when its powered on with props off.

    IMU link, no need to chill it. ;)
    IMU Calibration | DJI Phantom Drone Forum

    Rod
     
Loading...
Similar Threads - props run faster Forum Date
Advanced Running P3 motors without props Phantom 3 Help Jul 2, 2016
Running the P3P without props? Pro/Adv Discussion Mar 31, 2016
Dji Phantom 2 - Run motors without props? General Discussion Feb 22, 2015
stock props on drunk irish man Phantom 2 Vision + Discussion May 30, 2014
Drunk irishman test with stock props on skin Phantom 2 Vision Discussion May 30, 2014