I'm trying to make an interplanetary tourist ship, which means I need to get fuel efficiency down. I decided to go with the nuclear engines, but I read somewhere that they tend to overheat.
What parts can I use to prevent that? I installed engine pre-coolers on the engines themselves (which are powered by fuel tanks you'll find on planes), but I don't think that'll be enough once I escape the atmosphere. How useful are they? Recommended radiators?