RE: Quick Novus CP question, hope someone can help
Check the gears real closely, you might have it too tight or too loose. I have had the gears get out of alignment after a crash before. Also the rotor blade needs to be set so it doesn't rub up against the housing in the back too. its possible the little tiny bearing is squealing. It might need replacing. You could try a tiny droplet of oil on it and see what happens. The bearing could have seized and it is the shaft inside it squealing.