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A Simplified Method for Estimating Subsonic Lift-Curve Slope at Low Angles of Attack for Irregular Planform WingsA simplified method is presented for estimating the lift-curve slope of irregular planform wings at subsonic speeds and low angles of attack. The present process is an extension of the method derived in NACA Technical Note 3911 and enables quick estimates of subsonic liftcurve slope, to be made whereas more refined procedures require considerable time and computation. Comparison of experimental and estimated values for a wide range of wing planforms having discontinuous spanwise sweep variation indicates good agreement. A comparison of the present procedure with a 20-step vortex method (NACA Research Memorandum L50L13) indicated good agreement for a variable-sweep configuration.
Document ID
19650072761
Acquisition Source
Langley Research Center
Document Type
Technical Memorandum (TM)
Authors
Spencer, Bernard, Jr. (NASA Langley Research Center Hampton, VA, United States)
Date Acquired
August 29, 2013
Publication Date
May 1, 1961
Subject Category
Aerodynamics
Report/Patent Number
NASA-TM-X-525
Report Number: NASA-TM-X-525
Accession Number
65N85163
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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