A propeller governor is required to control the blade pitch of hydraulic constant speed propellers. Once set, the governor automatically and continuously changes the propeller blade pitch to maintain a constant engine speed (RPM).
A standard propeller requires oil pressure to increase pitch, whereas a counter-weighted aerobatic propeller requires oil pressure to decrease pitch (increases RPM).
Whir Wind Aviation is an authorized reseller of Jihostroj brand governors, the "original Czech governor." For detailed information on the operation and theory of the governor, please visit Jihostroj's web site at:
** GOVERNOR RETURN POLICY: Governors that are removed from the original OEM packaging cannot be re-sold as new. As such all governor sales are final and returns are prohibited with the exception of product defect or malfunction within the Jihostroj warranty period. Possible warranty returns must be approved by Whirlwind Aviation in advance. **