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Wind-tunnel investigation of the descent characteristics of bodies of revolution simulating anti-personnel bombsAn investigation has been conducted in the Langley 20-foot free spinning tunnel to study the relative behavior in descent of a number of homogeneous balsa bodies of revolution simulating anti-personnel bombs with a small cylindrical exploding device suspended approximately 10 feet below the bomb. The bodies of revolution included hemispherical, near-hemispherical, and near-paraboloid shapes. The ordinates of one near-paraboloid shape were specified by the Office of the Chief of Ordnance, U. S. Army. The behavior of the various bodies without the cylinder was also investigated. The results of the investigation indicated that several of the bodies descended vertically with their longitudinal axis, suspension line, and small cylinder in a vertical attitude,. However, the body, the ordinates of which had been specified by the Office of the Chief of Ordnance, U. S. Army, oscillated considerably from a vertical attitude while descending and therefore appeared unsuitable for its intended use. The behavior of this body became satisfactory when its center of gravity was moved well forward from its original position. In general, the results indicated that the descent characteristics of the bodies of revolution become more favorable as their shapes approached that of a hemisphere.
Document ID
19710072849
Acquisition Source
Legacy CDMS
Document Type
Other - NACA Research Memorandum
Authors
Sher, S. H. (NASA Langley Research Center Hampton, VA, United States)
Date Acquired
August 6, 2013
Publication Date
December 19, 1951
Subject Category
Aerodynamics
Report/Patent Number
NACA-RM-SL51L13
Accession Number
71X71431
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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