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- W1963509743 abstract "Abstract : A comparison of the zero lift drag coefficients of a stepped base projectile to flat base and truncated boattail base projectiles is presented. Three model configurations were investigated during the test program. These included an experimental 20mm round with a 7 1/2 deg., truncated boattail base, a round modified with a flat base, and a round modified with a stepped base. All of the projectiles were tested at sea level conditions in an indoor ballistic free-flight facility. This paper discusses the aerodynamic experiment and the data obtained. Results show that the zero lift drag coefficient of the stepped base projectile was less than that of the flat base round for the subsonic Mach number range and approximately the same for the transonic and supersonic ranges. However, the stepped base projectile produced zero lift drag greater than that of the boattail round at each Mach number. Keywords: Base drag; Separated flow; projectile afterbody; Ballistic testing." @default.
- W1963509743 created "2016-06-24" @default.
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- W1963509743 date "1987-03-24" @default.
- W1963509743 modified "2023-09-27" @default.
- W1963509743 title "An examination of controlled vortex drag using stepped afterbodies from M = 0.5 to 3.0" @default.
- W1963509743 doi "https://doi.org/10.2514/6.1987-445" @default.
- W1963509743 hasPublicationYear "1987" @default.
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