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STUDY OF A SINGLE-BLADE PROPULSION SYSTEM FOR RETRACTABLE ENGINE SAILPLANES

Paolo Ballocchi, Mario Beretta, Gianni Fumagalli

Abstract


If on one hand aviation moves towards propellers with five, six and more blades, on the other our study is devoted to the use of a single-blade propeller. This apparent contradiction is due to the fact that while in common airplanes the problem is how to discharge in air the higher and higher powers of modem engines, in our technical field the engine must be as light and small as possible so that, once you have retracted it, you don't feel it anymore during the soaring flight. So the small thrust values required by motorgliders and the relatively low powers of the engines make very interesting the use of this kind of propeller with high levels of efficiency, smoothness and simplicity.

Keywords


Aerodynamics, Structures, Design

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