THERE are reasons for believing that in certain states of working, the resultant aerodynamic force on a blade element of an airscrew is normal to a helicoidal surface. The object of the present inquiry was to see to what extent this is borne out by experimental results. It is found that between no-thrust and maximum efficiency, the hypothesis is confirmed by experimental results for a certain set of helicoidal airscrews. In the course of the inquiry, a method of evaluating the torque coefficient! over the same range, is indicated—the method giving good accuracy.
Airscrew Torque-Coefficient
Aircraft Engineering and Aerospace Technology ; 17 , 8 ; 229-231
1945-08-01
3 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
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