Welcome to PhantomPilots.com

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

how to know if your motor is going bad?

Discussion in 'General Discussion' started by yappy, Apr 17, 2013.

  1. yappy

    Joined:
    Apr 3, 2013
    Messages:
    36
    Likes Received:
    0
    Hi,

    How do you tell if your motor is going bad or is bad ? The phantom is my first aircraft so I don't have much experience.

    I've flown several times without problems and have had fun. I just want to be on the safe side.
     
  2. tanasit

    Joined:
    Jan 28, 2013
    Messages:
    554
    Likes Received:
    2
    Spin each motor and see if they all feel the same. Spin very fast and memorize how long it comes to a stop and see if all gives about the same duration. Spin slowly and feel if the cogging resistance of each motor is about the same.
    If not, then you know which one(s) is about to go bad or bad depending on how it behaves.
    After the landing, feel each motor with your hand. Each should have similar temperature, otherwise the warmest one may be about to go bad.
    If you fly in a dusty environment, you may want to use the motor spray cleaner that is plastic safe.
    You should also lubricate the bearings every 10 or so flights with high speed brushless motor oil.
    I drill a hole under each motor for easier oiling, other wise you have to remove the 4 screws on each motor to oil the bottom bearing.

    [​IMG]

    Did I mention...balance the motors? :D
     
  3. yappy

    Joined:
    Apr 3, 2013
    Messages:
    36
    Likes Received:
    0
    I turned them slowly.

    3 feels freeish ( not so much resistant ) and 1 feels very course ( more resistant than the others)

    Does this mean the course one is going bad ?
     
  4. fasteddie

    Joined:
    Apr 4, 2013
    Messages:
    26
    Likes Received:
    0
    My Phantom is Brand new and before my first flight spun each motor and all felt a little course but one was worse than the others. I have flown it 3 times now and all fights have been good. I need to feel the motor temps next time. I am considering an uograded bear's ng that are sold on Ebay, they look easy to install and will be smoother.
     
  5. tanasit

    Joined:
    Jan 28, 2013
    Messages:
    554
    Likes Received:
    2
    Definitely you have to do more investigation on that one. I would remove the motor and lubricate BOTH bearing first. Unless when you turn it and feel a little gritty, you may have to clean it with either pressurized air from the air can or compressor of some kind. Otherwise get the motor spray cleaner to do the job (double check that it is plastic safe). Most likely you will NOT need the new bearing. If after the cleaning and oiling, it still feels the same, then you have to remove both bearings and swap them or flip each over and make sure you properly seat them.
    Good luck,
     
  6. Gary39

    Joined:
    Apr 8, 2013
    Messages:
    129
    Likes Received:
    1
    Location:
    Groton,N.Y USA
    Hi guys, just a quick question cause I don't know, arent the bearings sealed ?