The Zero Alpha is a state-of-the-art digital engine speed governor for model helicopters which automatically monitors engine speed and maintains constant RPM by using an active integral control algorithm. It not only works well in all maneuvers but also has a very user-friendly interface and is easy to setup. It is designed to govern the engine speed between 10,500 and 21,000 RPM. Like all PCM radio accessories, this governor will only work while a transmitter signal is received
