Alek Ituin, on 27 October 2014 - 10:34 PM, said:
The Rifle itself should generate heat through the massive charge required to activate the electromagnetic coils. Unless it's a filthy peasant railgun, in which case it can go melt itself with Ghost Heat for all I care(and it can also stop being called a Gauss Rifle).
The round generates heat, you're correct there, but it's all dependent on velocity. Spacecraft going through reentry hurtle towards the planet at Mach 25+, which is ~8.5km/s. Yes, 8.5 kilometers per second. Our Gauss Rifle only fires a 2km/s slug, it doesn't even manage hypervelocity (3km/s)... If it did however, it would be hitting for something like 50+ damage per slug.
Needless to say, if spacecraft can handle 8.5km/s without melting, I'm fairly confident that a simple superalloy barrel could easily handle a small 2km/s slug. And for the record, humans have been making superalloys since the 1940's, so they're nothing new.
Space craft are designed to deflect heat with special panels. A single panel malfunction and the whole ship can go up in flames. There is a difference between a gun, that has to store and focus the heat and force outward, and a ship that just deflects the heat away. Now because it doesn't generate propellent heat like a normal gun would, that keeps it cooler. but the equipment inside would heat up. lots of electrical flow to the gun when it charges, and when it releases its one giant burst of magnetic energy rushing down the barrel. That would generate quite a lot of heat, these slugs come in groups of 10 per ton, meaning that each slug is 1/10th of a ton, being flung by magnets in less than a second. The charge up would generate heat in the gun and the slug being flung would generate heat. Lasers generating heat in their own barrel makes no sense. Lasers are a focused beam of light on a single point, meaning that the lenses that allow the light to pass through with little to no reistance wouldn't generate heat at all, only what the laser actually hit would generate heat.
Really there is no reason they cannot put lots of heat on the gauss rifle, Its science fiction. if it was science fact, the heat of terra therma and the cold of frozen city would change how your gauss slug would fly, changing the damage entirely, and on a map like manifold with almost no atmosphere, every weapon wouldn't really have an optimal range. bullets from my machine guns would be flying just as fast when they left the barrel as when they hit the enemy 200m away.