So today I saw another plane that makes a funny noise when the motor is stopped. I don't know exactly how to describe it, but I joked that his plane would fly better if he got the guitar out of it. Sounds like someone plucking one guitar string really hard. Every time the motor stops. I think i've only seen it on larger models. Any idea what it is? Is it bad? And how do you get rid of it if you have to? Thanks!
It's easy to accidentally enable brake on many ESC's because it's usually the first item in the programming. If you inadvertently power up with the throttle stick wide open thereby entering programming mode, then realising your mistake you close the throttle, you may well enable the brake without knowing.
It's easy to tell if the brake is on. The motor will stop dead as soon as you close the throttle rather than free-wheeling for a few moments.
Could be a debonded magnet. The motor in my mini switch had a debonded magnetic and I reglued it with ca and baking soda, still makes the noise however until past about half throttle, and is most noticeable when the prop just about stops turning Motor still works, but sound is like an oscillating whir noise. I suppose it could depend on the motor and the harmonics made by the sound within the motor, as well as whether or not the motor is situated inside a cowl. My motor works perfectly fine, same top end, no overheating. It is possible that it a bearing that isn't moving freely too.
I had a HV Castle ESC on 10 cells w/ a cut down 18/10 prop. The brake was on and "twaing" is a perfect description of the noise it made when I engaged the brake. Used to scare the H--- out of the wet power guys (- :
It's not too difficult. I find eflite motors a pain to take apart, or at least the one I have. To fix magnet dab some ca glue, quickly sprinkle some baking soda on and pop the magnet in. When I fixed the turnigy motor I guess I didn't get the magnet in perfectly, so there is a bit of noise still.