The Rotor Head Speed Governor operates the throttle servo to maintain a constant rotor head speed at all times. This decreases the amount of collective stick movements you must make allowing you to concentrate more on the other controls! It is possible to select two rotor head speeds with the Governor. Typically a lower RPM is selected for hovering while a higher RPM is selected for aerobatics. This can be done in flight by adjusting a dial or flipping the rpm select switch on your transmitter.