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The Characteristics of Two Model Six-blade Counterrotating Pusher Propellers of Conventional and Improved Aerodynamic DesignTwo airfoil plans were used for propeller blades. One is modified Clark Y section designed for structural reliability and the second an NACA 16 airfoil section designed to produce minimum aerodynamic losses. At low air speeds, the propeller designed for aerodynamic effects showed a gain of from 1.5 to 4.0 percent in propulsive efficiency over the conventional type depending on the pitch. Because of the numerous variables involved, the effect of each one on the aerodynamic characteristics of the propellers could not be isolated.
Document ID
19930093327
Acquisition Source
Legacy CDMS
Document Type
Other - NACA Wartime Report
External Source(s)
hdl:100.2/ADA800613
Authors
Pepper, Edward (National Advisory Committee for Aeronautics. Langley Aeronautical Lab. Langley Field, VA, United States)
McHugh, James G. (National Advisory Committee for Aeronautics. Langley Aeronautical Lab. Langley Field, VA, United States)
Date Acquired
September 6, 2013
Publication Date
April 1, 1942
Subject Category
Aerodynamics
Report/Patent Number
NACA-WR-L-404
Report Number: NACA-WR-L-404
Accession Number
93R22617
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
Keywords
PROPELLERS - PROPULSIVE EFFICIENCY
PROPELLERS, PUSHER - EFFICIENCY
PROPELLERS, SIX-BLADE
AIRFOILS - CLARK Y (MOD ) PROPELLER
PROPELLERS, TANDEM - WIND TUNNEL TESTS
CHARTS - PROPELLERS
AIRFOILS - NACA 16-SERIES PROPELLER
PROPELLERS BLADES - SETTING
WIND TUNNEL TESTS (NACA - PRESSURE-19 FT)
PROPELLERS - CHARACTERISTICS

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