While doing some googling, I came across a great website for those interested in rocketships! Ryan K even mentioned the same link in my Tartarus Prisoner Transport thread. How's that for serendipity. The link is:

http://www.projectrho.com/rocket/index.html

If you're interested in some of the realistic work behind rockets, this site has it. If you're interested in various aspects of space travel, this site has it. It even has an art gallery with a bunch of cool pics that will certainly act as inspiration for future work (for me at least ).