TK-14 : My Powerful electric COILGUN

Описание: I built a hand-held coilgun，whick looks like a handbag.Here are its parameters：
Primary power source:1x4s-14.8v,3000mAh
Capacitors :400v 3050uf(use 410v)
Switches:14xIGBT
Max coil current: 550A
Projectile:0.315x0.866"（8X22mm） steel 8.4g
Rate of fire：2 rounds/sec
Muzzle velocity：97 m/s
Muzzle energy ：39.5j
Energy spent for a shot:250j
Battery Capacity :Up to 300 shots per battery
Efficiency：16%

Overall Weight:1.8kg
Barrel length :9.05”
Bore:0.315"
Physical Dimensions 11.4” x 6.5” x 1.97”