Barry's Coilguns

Mark II Results - Starting Position

How does the performance depend on the projectile's starting position?

Projectile's Starting Position

Graph of speed versus projectile starting position The exit speed is quite sensitive to the projectile's precise starting position. It takes only a few millimeters further in or out to gain or loose significant speed. This graph shows the measured speed compared to how far the projectile was inserted into the coil.

Dist (x) Muzzle Speed
18.6mm   4.46 m/s
20.4 4.67
21.5 5.00 m/s
22.5 4.73
24.0 4.26
26.8 3.73
28.5 1.25


A projectile's starting position must tuned to be within a 2mm range to achieve optimum results.

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