Free flight spark range tests of the Copperhead projectile were conducted in the BRL Transonic Range, to obtain free flight aerodynamic data for the full-scale, tactical configuration. The free flight data show good general agreement with previously obtained wind tunnel results. The tactical Copperhead projectile is statically stable at all Mach numbers tested. A weak slow-arm dynamic instability was observed at transonic and high subsonic speeds, for small angles of attack. The mild dynamic instability could result in limit-cycle, or 'coning' motion at transonic speeds; however, the data obtained in the present tests are too sparse to permit a quantitative determination of limit-cycle behavior.
Free Flight Range Tests of the Copperhead Projectile
1981
67 pages
Report
No indication
English
Ammunition, Explosives, & Pyrotechnics , Detonations, Explosion Effects, & Ballistics , Projectiles , Aerodynamic characteristics , Projectile trajectories , Spark shadowgraph photography , Aerodynamic drag , Aerodynamic stability , Transonic characteristics , Free flight , Subsonic characteristics , Coefficients , Magnus effect , Pitch(Motion) , Damping , Yaw , Models , Configurations , Copperhead projectiles , XM-712 projectiles , 155-mm Projectiles , Limit cycles , Shadowgraphs , NTISDODXA
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