An isosceles triangle twisted into a screw surface about its axis is proposed as a propeller for transonic flight speeds. The purpose is to attain the drag reduction associated with large sweepback in a structurally practicable configuration. A mathematical theory for such a propeller is presented. Calculations taking account of wave and skin-friction drag indicate a net efficiency of the order of 80 percent at Mach number 1.1. A 12-foot propeller is estimated to be able to absorb 18,500 brake horsepower at 840 miles per hour at sea level.
Transonic Propeller of Triangular Plan Form
1947
43 pages
Report
No indication
English
Transonic propeller of triangular plan form
Engineering Index Backfile | 1947
|A transonic propeller of triangular plan form
NTRS | 1947
|A transonic propeller of triangular plan form
TIBKAT | 1947
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AIAA | 1987
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