Welcome to PhantomPilots.com

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

Prop came off

Discussion in 'General Discussion' started by bullerman1946, Aug 19, 2018.

  1. bullerman1946

    Joined:
    Jul 4, 2018
    Messages:
    90
    Likes Received:
    8
    I saw in one of the post where the fellow thought one of his props came off. I have a phantom 3 standard use the props that came with it. How do you keep a prop from coming off. It looks like to me with the way they go on they wouldn't come off but I don't know. Can anybody comment on this. Thanks
     
  2. Fly Dawg

    Joined:
    Apr 29, 2016
    Messages:
    3,029
    Likes Received:
    1,228
    Location:
    Watkinsville, Georgia
    About the only thing you can do is make sure they are tightened before every flight. It is quite possible for them to loosen, especially so when braking at high speed, due to the very fast slow down of the motors which essentally loosens them somewhat. If they are not fully tightened, then they will fly off.
     
    LarBear360 likes this.
  3. LarBear360

    Joined:
    Jul 26, 2017
    Messages:
    1,574
    Likes Received:
    718
    Location:
    Irvine (Orange County) CA
    The key to avoiding prop failure is be sure they are installed correctly using the color coded dots. Black on Black, Silver on Silver. Don't over-tighten or you could fracture the plastic. The P3S ships with a tightening tool. Inspect each prop before flying.

    I'v heard of a prop breaking in air, but not coming unscrewed.
     
  4. Fly Dawg

    Joined:
    Apr 29, 2016
    Messages:
    3,029
    Likes Received:
    1,228
    Location:
    Watkinsville, Georgia
    Coming unscrewed has happened numerous times. They both exhibit the same signal responses in the motor data files ( When you can get them ) and the only way to tell the difference is by looking at the motor hub, which would be obvious.
     
    sar104 and Oso like this.
  5. LarBear360

    Joined:
    Jul 26, 2017
    Messages:
    1,574
    Likes Received:
    718
    Location:
    Irvine (Orange County) CA
    Yikes!
     
  6. sar104

    Joined:
    Mar 22, 2014
    Messages:
    4,163
    Likes Received:
    1,898
    Location:
    Los Alamos, NM.
    As described by @Fly Dawg, when the motor is applying torque to keep the props spinning under load (air drag) then the props are essentially self-tightening. But, if that torque is removed suddenly, the angular momentum of the spinning prop can lead to the motor acting as a brake, at which point the torque on the prop thread is temporarily reversed sufficiently that an inadequately tightened prop can spin off.
     
  7. Meta4

    Meta4 Moderator
    Staff Member

    Joined:
    Jan 8, 2014
    Messages:
    12,884
    Likes Received:
    7,120
    That's actually a prop loosening tool and is for removing stuck props.
    The hub material in the prop is relatively soft and over-tightening is to be avoided as it can damage the threads that hold the props on.
     
    sar104 likes this.
  8. LarBear360

    Joined:
    Jul 26, 2017
    Messages:
    1,574
    Likes Received:
    718
    Location:
    Irvine (Orange County) CA
    Good point. I go both ways:>
     
  9. Fly Dawg

    Joined:
    Apr 29, 2016
    Messages:
    3,029
    Likes Received:
    1,228
    Location:
    Watkinsville, Georgia
    "Hand Tight" can differ between individuals and their prospective of the definition. It's too bad they ( Meaning DJI ) do not provide an installation torque value. That could easily be done. Granted probably unnecessary, other than peace of mind.
     
Loading...
Similar Threads - Prop came off Forum Date
P3A - Prop came off at 390 feet....update - Yay Amazon Pro/Adv Discussion Feb 7, 2016
4 propellers came off mid flight Phantom 2 Vision + Discussion May 9, 2015
props cäme off, why would that happen? Phantom 1 Discussion Jul 27, 2014
Prop came off my phantom, now motor won't work General Discussion Jan 20, 2014
Phantom 4 with camera in update mode (propably) Phantom 4 Help Oct 14, 2017