Effect of railgun electrodynamics on armature discard

Zielinski, A.E.; Weinacht, Paul; Powell, J. David

doi:10.1109/20.738387

Cited by 3 publications

(3 citation statements)

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“…Also, the tests reported here used an armature current profile that previously demonstrated a slight improvement in subprojectile accuracy. [2] Th' is acceleration profile was consistently used in this jump test.…”

Section: Discussionmentioning

confidence: 99%

“…Results from a prior study indicated that a conducting front contact armature configuration had slightly better ballistic performance when the armature current was reduced just before exit. [2] Also, large currents at ILP exit were found to have deleterious effects on the muzzle. [3] To satisfy both requirements, an explosively activated closing switch was connected across the launcher rails at the muzzle.…”

Section: Methodsmentioning

confidence: 99%

“…Fluctuating part of free-flight swerving motion of subprojectile in the horizontal plane, shot 11.computed fluctuating component of the swerving motion of the projectile for one of the shots in the test program. The subprojectile's yaw is close to a minimum at the 40 m yaw card which minimizes the impact of the displacement due to the fluctuating part of the swerving motion on the jump diagram.Finally, the GD comlponent, which only appears in the vertical displacement, has been computed in mils from the launch velocity ( V ) and range(2) asgz GD = 1000-2v2shows a four-component jump vector diagram using impact data at 40 m down range for shot 8. The four components evalua,ted are CG, SD, AJ, and GD.…”

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Improved integrated launch package ballistic performance

Zielinski

Weinacht²

1999

IEEE Trans. Magn.

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A detailed experimental investigation of the launch and flight performance of a kinetic energy fin-stabilized penetrator has been performed. The Integrated Launch Package (ILP) consists of the subprojectile and mid-riding armature. The armature front contact is electrically insulated from the rails. This configuration has shown potential for effectively managing the launch disturbances. To evaluate the transitional ballistics, aeroballistics, and jump characteristics, single-shot firings with an exit velocity of 1,350 m/s were conducted at the ARL Transonic Experimental Facility, APG, MD. The impact data show larger variability in the vertical direction than in the horizontal direction. Results from the j u m p survey indicate that effects of the deviation from the launcher centerline (i.e., straightness) contribute significantly to the target impact dispersion. Substantial contributions from the linear and angular rates at the muzzle are evident in the vertical direction. The contribution attributable to sabot discard in either plane is minimal. When possible, comparisons are made to our earlier investigation which examined the ballistic behavior of a similar ILP with a conducting front contact.

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Section: Discussionmentioning

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Section: Methodsmentioning

confidence: 99%

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