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The Aerodynamic Characteristics of Full-Scale Propellers Having 2, 3, and 4 Blades of Clark Y and R.A.F. 6 Airfoil SectionsAerodynamic tests were made of seven full-scale 10-foot-diameter propellers of recent design comprising three groups. The first group was composed of three propellers having Clark y airfoil sections and the second group was composed of three propellers having R.A.F. 6 airfoil sections, the propellers of each group having 2, 3, and 4 blades. The third group was composed of two propellers, the 2-blade propeller taken from the second group and another propeller having the same airfoil section and number of blades but with the width and thickness 50 percent greater. The tests of these propellers reveal the effect of changes in solidity resulting either from increasing the number of blades or from increasing the blade width propeller design charts and methods of computing propeller thrust are included.
Document ID
19930091715
Document Type
Other
Authors
Hartman, Edwin P
Biermann, David
Date Acquired
September 6, 2013
Publication Date
January 1, 1938
Report/Patent Number
NACA-TR-640
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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