-plus, beam cannons and stuff were still new and no doubt caused problems with the colossus. they were still just learning the new techs.
i would guess a couple days for a fighter/bomber, a couple months for cruisers (3-4) maybe 3/4 of a year for corvettes (theyre packed tight with coolio technology!) and a year or 2 for destroyers.
weapons... *snickeR* missiles probably roll off the assembly lines hundreds at a time every MINUTE... well, like, hornets anyway. a helios probably takes longer than a fighter (you have to be careful so it dont detonate accidentally... failsafes only work SO well)