Don’t know if you’ve seen this rendering work by Rhys Taylor of Orion before, but I’m gob-smacked…
http://rhysy.plexersoft.com/orion/index.html
…and his fictional Orion-powered space-fleets around Callisto…
http://rhysy.plexersoft.com/Deep%20Space%20Force%20Gallery/
…plus a 3-D animation of an Orion launch…
http://www.nuclearspace.com/gallery_orion_movie.htm
…quite impressive really. Quite dire in other respects – nuclear Cold-War space-fleets have an Apocalyptic feel.
Another link is an interview with Steve Howe discussing his nuclear rocket work and his antimatter sail concept for a very light probe (10kg) to Alpha Centauri…
http://www.nuclearspace.com/article/Sview/HOWE_view.htm
…needs 0.017 kg of antimatter which is a BIG ask presently, but doable given some dedicated accelerators on the Moon *sigh*
