As for rate of fire, I guess it's partially a function of how big your power-plant it, how many rail guns you have and how quickly you can recharge the capacito

As for rate of fire, I guess it's partially a function of how big your power-plant it, how many rail guns you have and how quickly you can recharge the capacitors (or rotate in fully charged ones). EDIT: Interesting, from wikiepedia (https://en.wikipedia.org/wiki/Railgun#U.S._Navy_tests https://en.wikipedia.org/wiki/Railgun#U.S._Navy_tests) "Currently the only US Navy ships that can produce enough electrical power to get desired performance are the Zumwalt-class destroyers; they can generate 78 megawatts of power, more than is necessary to power a railgun. Engineers are working to derive technologies developed for the DDG-1000 series ships into a battery system so other warships can operate a railgun.[54] Most current destroyers can spare only nine megawatts of additional electricity, while it would require 25 megawatts to propel a projectile to the desired maximum range [55] (i.e. to launch 32MJ projectiles at a rate of 10 shots per minute). Even if current ships, such as the Arleigh Burke-class destroyer, can be upgraded with enough electrical power to operate a railgun, the space taken up on the ships by the integration of an additional weapon system may force the removal of existing weapon systems to make room available."