droop

droop

A progressive decrease in RPOM with load in a gas turbine engine whose speed is governed with a fly-weighttype governor in the fuel control. As the load increases, the pilot valve drops down to meter more fuel. The lower position of the valve decreases the compression of the speeder spring and allows the flyweights to assume an on-speed position at a lower rpm.

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Industry/Domain: Aviation
Category: Aircraft maintenance; Powerplant
Company: FAA
Product: The Aviation Maintenance Technician Handbook—Powerplant
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