TM 5-4240-501-14&PTHEORIES OF OPERATIONGoverningFigure 35.The mechanical governor, Fig. 35, works in a similarmanner except that instead of the force of the air blowingagainst the vane, we have the centrifugal force of flyballweights opposing the governor spring.In either case, operation is the same. As the load on theengine increases, the engine will start to slow down. Assoon as this happens, the centrifugal force of the flyballweights lessens. This allows the governor spring to pullthe throttle open wider increasing the horsepower tocompensate for the increased load and thus maintain thedesired governed speed.If the load on the engine lessens, the engine starts tospeed up. This will increase the pressure of thecentrifugal force and the spring will be stretched a littlefarther thus closing the throttle and reducing the enginepower. A properly functioning governor will maintain thisdesired governed speed within fairly close limits.In general, an engine that has good compression,carburetion, and ignition will operate efficiently.However, dirt or neglect can ruin an engine quickly. Itshould be the duty, therefore, of every salesman orrepair man to instruct the customer in the properoperation and care of the engine so that he will obtainthe long service life that is built into the engine at thefactory.2014
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