Because of uncertainties in prediction of noise levels for propellers at low tip speeds, tests were made on rear propeller of Hovercraft Development Ltd HD 1 hovercraft; tests brought out sources of discrepancies existing between theory and experiment and were also useful in providing general background to subject; as agreement with theory does not seem particularly good, simple empirical method was devised for predicting overall noise levels at 105° to thrust axis, representing direction of maximum or near maximum noise.
Empirical study of hovercraft propeller noise
Hovering Craft Hydrofoil
Hovering Craft and Hydrofoil ; 5 , n 3-4
1965
23 pages
Article (Journal)
English
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