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Model Test on Performance of Propellers Driven by an Outboard Motor
Technical Paper
911239
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English
Abstract
Accurate evaluation of the performance of propellers driven by an outboard motor at sea or lake is very difficult due to complicated environmental conditions. In this paper, the hydrodynamic characteristics of two kinds of propellers were measured not only in a towing tank but also in a cavitation tunnel. These propellers have the same geometrical shape except for blade contour and skew line. One of them is used for a high speed motor boat and has a conventional skew line. The other has a cleaver type of blade contour, which is employed for a racing boat.
The tests in two experimental facilities demonstrated that under super-cavitating conditions, the efficiency of the former propeller was higher than that of the latter, while the latter propeller was superior to the former regarding air-drawing. These model tests provide us invaluable information to design high speed motor boat propellers.
Authors
Citation
Sumino, Y. and Ukon, Y., "Model Test on Performance of Propellers Driven by an Outboard Motor," SAE Technical Paper 911239, 1991.Also In
References
- Shiba, H. “Air-drawing of Marine Propellers” Report of Transportation Technical Research Institute 1953
- Kudo, T. et al. “Influence of Propeller Rake on Air-drawing” Proc. of 1989 Autumn meeting of SRI Nov. 1989
- Koyama, K. “Numerical Method for Propeller Lifting Surface in Non-uniform Flow and Its Application” J. of the Soc. Nav. Arch. Japan 137 June 1975