| 摘要 |
An overspeed protection system is provided for a turboprop engine. The engine includes a governor pump and a constant speed governor both of which are driven by the turbine through a gear reduction assembly. The constant speed governor is in communication with the pitch adjustment means of the propeller and is operative to effect adjustments in the propeller pitch. The system further includes a pressure sensitive switch that is operative to sense a decrease in pressure of the fluid flow produced by the governor pump and thereby sensing a system failure. A solenoid is provided and is operative to prevent pitch adjustments after a system failure sensed by the pressure sensitive switch.
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