In this report the efficiencies of two series of propellers having two types of blade sections are compared. Six full-scale propellers were used, three having R. A. F.-6 and three Clark Y airfoil sections with thickness/chord ratios of 0.06, 0.08, and 0.10. The propellers were tested at five pitch setting, which covered the range ordinarily used in practice. The propellers having the Clark Y sections gave the highest peak efficiency at the low pitch settings. At the high pitch settings, the propellers with R. A. F.-6 sections gave about the same maximum efficiency as the Clark Y propellers and were more efficient for the conditions of climb and take-off.
Comparison of Full-Scale Propellers Having R.A.F.-6 and Clark Y Airfoil Sections
1932-01-01
Miscellaneous
No indication
English
Comparison of full-scale propellers having R.A.F.-6 and Clark Y airfoil sections
Engineering Index Backfile | 1931
|Engineering Index Backfile | 1938
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