What size capacitor needed to power solenoid?

Lefty, Grumpy ?? Sanity check??

I was once sat a very short distance away from a coil being fed DC current with a large capacitor across it. The capacitor exploded, the whole room was filled with silver paper fluttering down like snow. It was only after this did the engineer in charge of it think of ripple current.

When current flows a mechanical force is generated in the conductors. In normal low currents this is insignificant and well withing the limits of a device be it battery or capacitor. However as the current increases so does the force.

Without the correct and sufficient calculations this could be a dangerous thing just to try.

However, the gung-ho attitude is very prevalent in some areas of western culture, and if you survive it is very funny.