overspeed governor

overspeed governor

[′ō·vər‚spēd ‚gəv·ə·nər] (mechanical engineering) A governor that stops the prime mover when speed is excessive.

overspeed governor

The illustration shows the propeller governor for an oil-counterweight propeller. The flyweights are connected to the valve and shaft and are rotated by the engine. The propeller control set by the pilot compresses the speeder spring. The counterweights are balanced by oil pressure and help maintain the desired RPM.A device to protect the engine against overspeeding. The servofuel is bled off when the governed engine speed is reached. The two types of governors are centrifugal and hydromechanical.