Practical Coilgun Design 

Capacitors

Kinetic EnergyHow many capacitors of some given size will result in what velocity? How is potential energy related to kinetic energy in a coilgun? The Energy BudgetThe amount of potential energy stored in a capacitor depends on the voltage: The total potential energy needed depends on the efficiency you can build, and what velocity you want to achieve. A conservative guess at coilgun efficiency is 1% or, in a highly tuned coilgun, it might reach 2%. The kinetic energy that corresponds to a desired velocity is: Now the exercise that I leave to the reader is to use algebra to confirm this equation that
gives velocity as a function of everything else, assuming 1% efficiency. Start with KE = PE*efficiency
to arrive at these results. With this equation you can try substitute your various numbers and see what sort of results you might get. 



Last Update 20080609
©19982021 Barry Hansen 