Determining small diameter propeller efficiency through wind tunnel test
by M. Sallehuddin; Mahzan Muhammad Iyas
International Journal of Vehicle Systems Modelling and Testing (IJVSMT), Vol. 9, No. 3/4, 2014

Abstract: Most small unmanned air vehicles are powered by a fixed pitched propeller. Since a fixed-pitch propeller will be efficient only through a narrow range of operation conditions, selecting the right propeller is crucial to airplane performance. A wind tunnel test rig was set-up to determine propeller efficiency at different diameters and pitch angles. The efficiency of each propeller is determined by applying the simple momentum theory to the airflow. Results from the tests were compared with results from software which used Glauret blade element theory. The experimental results are about 95% accurate when the propeller advance ratio is between 0.2 and 0.5.

Online publication date: Tue, 30-Dec-2014

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