1974-02-01

A Quiet Propeller for Commuter and General Aviation Aircraft 740359

An aircraft propeller with five blades has been developed for application on relatively high horsepower turbine engines. This propeller is capable of absorbing high horsepower at low engine rpm to effect a low propeller noise emission.
Propeller performance remains satisfactory, as its design is intended for a commuter type aircraft. Structurally, the addition of a blade has not created serious design problems. For its intended application, the five-blade best satisfies the requirement for a “quiet” propeller. It is doubtful if the addition of more blades would be desirable.

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