Tests were made of four propellers, with diameters of 10 feet, having different blade plan forms. One propeller (Navy design no. 5868-r6) was of the usual present-day type and was used as a basis of comparison for the other three, which had unusual plan forms distinguished by the inward (toward the hub) location of the sections having the greatest blade width. It was found that propellers with points of maximum blade width occurring closer to the hub than on the present-day type of blade had higher peak efficiencies but lower take-off efficiencies. This results was found true for a "clean" liquid-cooled engine installation. It appears that some modification could be made to present plan forms which would produce propellers having more satisfactory aerodynamic qualities. The propellers with the inward location of the points of maximum blade width had lower thrust and power coefficients and stalled earlier than the present-day type.
The Aerodynamic Characteristics of Four Full-Scale Propellers Having Different Plan Forms
1938-01-01
Miscellaneous
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English
Aerodynamic characteristics of four full-scale propellers having different plan forms
Engineering Index Backfile | 1938
|Aerodynamic characteristics of four full-scale propellers having different plan forms
Engineering Index Backfile | 1938
|Aerodynamic characteristics of four full-scale propellers having different plan forms
Engineering Index Backfile | 1938
|Aerodynamic characteristics of six full-scale propellers having different airfoil sections
Engineering Index Backfile | 1939
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