Tests of 10-ft. diameter, eight-blade, single - and dual - rotating propellers were conducted in 20-ft propeller research tunnel. Propellers were mounted at front end of a streamline body in spinners that covered hubs and parts of shanks. Effect of a symmetrical wing mounted in slipstream was investigated. Blade-angle settings ranged from 20 Degrees to 65 Degrees. Results indicated that dual rotation resulted in gains of from 1 to 8 percent in efficiency over single rotation for eight-blade propellers, but presence of a wing reduced gain about one-half. Greater power absorption caused by dual rotation over flight range and higher efficiency or thrust for range of take-off and climb was indicated
Wind-tunnel Tests of Eight-blade Single and Dual-rotating Propellers in the Tractor Position
1941-11-01
Sonstige
Keine Angabe
Englisch
PROPELLERS, FOUR-BLADE VS SIX-BLADE , PROPELLER-WING COMBINATIONS , PROPELLERS - EFFICIENCY , Aerodynamics , PROPELLERS - HAMILTON STANDARD WIND TUNNEL TESTS (NACA-PRT) , PROPELLERS, TANDEM - WIND TUNNEL TESTS , PROPELLERS, EIGHT-BLADE , CHARTS - PROPELLERS , NACELLE-PROPELLER COMBINATIONS, TRACTOR , PROPELLERS, THREE-BLADE
Wind-tunnel tests of eight-blade single- and dual-rotating propellers in tractor position
Engineering Index Backfile | 1941
|Wind-tunnel tests of four- and six-blade single- and dual-rotating tractor propellers
Engineering Index Backfile | 1942
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