outrunner noise at full stick
hey guys,i have a 50-55 400kv turnigy in a yak55 and she been flying like a dream until i powered up to take off and the motor made a crunching sound and the prop looked like it was jamming,the timing was set too medium so i changed it to high and now that problem has gone but can hear buzzing kind off noise at around half stick but performance is still ok?help me is it loose magnets