Barry's Coilguns 

Mark 4

Estimating Kinetic EnergyWe want to know the expected kinetic energy of the projectile to estimate the velocity of various projectiles. Kinetic EnergyNote that potential energy PE = CV^{2}/2 (where C is farads, and V is voltage) Also note kinetic energy KE = mv^{2}/2 (where m is kilograms and v is meters/sec) In coilguns, KE is related to PE by an efficiency factor 'e' defined as: e = ^{(KE)}/_{(PE)} Set the kinetic energy equal to the efficiency multiplied by potential energy, and solve for velocity: Assuming typical values for this coilgun:
At minimum speed:
At maximum speed:




Last Update 20101110
©19982023 Barry Hansen 