I am having some problems with the motor from my FT Power Pack F. When I throttle the motor on without a prop, the motor will run fine, but when I throttle up the motor with a prop on, it will run fine for a few seconds but when reaching half throttle will make a noise that sounds like it is hitting something. There are no visible contacts with the prop or the motor so I don't know how to solve this problem.
Help! Power Pack F Motor Problems
- Thread starter LoyalDart
- Start date
randyrls
Randy
First thing is to check the screws. If they screw through the firewall into the rear of the motor, they MUST be the shorter screws. Make sure they are not contacting the windings inside the motor. Check the back of the motor and make sure it is not rubbing on the firewall. Gently push sideways on the motor shaft in both the front and back to see if there is any "slop". Is the prop that same hole size as the motor? Does the motor speed up and slow down?
Tench745
Master member
What you're describing sounds like the motor is losing timing. Brushless motors work by sending electrical signals to different windings within the motor in a specific sequence, pulling each magnet in the bell a little further around the circle. If the signals to the motor windings are moving faster than the bell (and thus prop) of the motor can spin, they get out of sync and you'll hear a kind-of high pitched squealing sound while the motor bell jiggles back and forth.
The most common cause for this is trying to turn a bigger prop than the motor can handle. What size prop are you running?
A less common cause can be a mis-programmed ESC. Most ESCs will set the timing automatically and this has worked fine with every motor/ESC combo I have tried. But, one can go in and set a specific timing. If the wrong timing was set, you can get this de-syncing.
