Strange sounds from brushless motor
I just bought a Dynam 1200mm Spitfire. It came with preinstalled motor and ESC. Look and hear this video:
I go to about 25% throttle, then down to 10% and stay there for a bit and finally cut off the throttle. The motor sounds strange and at 10% it sounds like it changes rpm up and down all the time.
Does anyone know if I got a damaged motor or something needs to be adjusted on the equiptment/electronics?