I think Project Orion is pretty cool in a retro-geek-Strangelovian way. Check out my Project Orion book review. This video is a good introduction.
Project Orion
Project Orion asks you to imagine a world where Apollo was consigned to history’s trash can before it left the drawing board. It is the story of a team of accomplished nuclear scientists, including the author’s father Freeman Dyson, who designed a spaceship powered by nuclear bombs. Starting in 1957, they planned missions to Mars by 1965 and to Saturn by 1970, not in capsules but in 4000 ton space-cruisers, complete with a traditional two ton barber’s chair. It was a serious, if extravagantly imaginative, plan for space exploration on a grand scale. [Read more…] about Project Orion