Can gunnit help me do a physics project on Railguns?

So I basically would like to know the size of a railgun (height, length, and width of the infastructure), the amount of time the projectile spends being accelerated inside the barrel/track, and the cross sectional area of a typical railgun projectile (if such a thing exists).

I will be writing a basic animation script on vpython to simulate a railgun firing a projectile into orbit; taking into account air resistance. Any help is appreciated- link to sources if possible!