Test conditions included operation at tip-speed ratios from 0.10 to 0.27 and at thrust coefficients from 0.0030 to 0.0060; results obtained with production rotor were compared with those for alternate set of blades having closer rib spacing and smoother and more accurately contoured surface.
Full-scale investigation of aerodynamic characteristics of typical single-rotor helicopter in forward flight
Nat Advisory Committee Aeronautics -- Tech Note
1947
14 pages
33 Supp plates
Report
English
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Engineering Index Backfile | 1948
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