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The Aerodynamic Forces and Moments on a Spinning Model of the F4B-2 Airplane as Measured by the Spinning BalanceThe aerodynamic forces and moments on a 1/12-scale model of the F4B-2 airplane were measured with the spinning balance in nine spinning attitudes with three sets of tail surfaces, namely, F4B-2 surfaces; F4B-4 fin and rudder with rectangular stabilizer; and with all tail surfaces removed. In one of these attitudes measurements were made to determine the effect upon the forces and moments of independent and of simultaneous displacement of the rudder and elevator for two of the sets of tail surfaces. Additional measurements were made for a comparison of model and full-scale data for six attitudes that were determined from flight tests with various control settings. The characteristics were found to vary in the usual manner with angle of attack and sideslip. The F4B-2 surfaces were quite ineffective as a source of yawing moments. The F4B-4 fin and F4B-2 stabilizer gave a greater damping yawing moment when controls were against the spin than did the F4B-2 surfaces but otherwise there was little difference. Substitution of a rectangular stabilizer for the F4B-2 stabilizer made no appreciable difference in the coefficient. Further comparisons with other airplane types are necessary before final conclusions can be drawn as to the relations between model and full-scale spin measurements.
Document ID
19930081250
Acquisition Source
Legacy CDMS
Document Type
Other
Authors
Bamber, M J
Zimmerman, C H
Date Acquired
September 6, 2013
Publication Date
February 1, 1935
Report/Patent Number
NACA-TN-517
Accession Number
93R10540
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
Keywords
SPINNING
SPINNING TESTS - BOEING F4B-2 WIND TUNNEL (NACA-VERTICAL)
TAIL SURFACES - DISPLACEMENT

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