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The use of brush armatures for accelerating railgun projectiles allows muzzle velocities in excess of 2.5 km/s and contact transition velocities of at least 1.8 km/s in middle-caliber launchers to be obtained. The technology developed at ISL is based on the use of multiple brush armatures. Asymmetric wear has been observed in dynamic launch experiments when the brushes were separated in shot direction...
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