Since Nuclear fusion is still just dreams this is pure Fud. 1st you need a fusion reactor which there isnt any let alone one that would fit into a smaller ship. Fiction
Shouldn't be a problem – the alien saucers would actually work, while the BR ones would be breaking down all the time due to "the wrong type of clouds"...
Meanwhile, the BBC has posted some images of some other interesting patents, including a 'hover-train' from 1969, and a 1967 plan for converting human waste into rocket fuel.
Yea I read about this in the Observer/Guardian (I forget) yesterday or the day before. Think it was front page. would be great to hop on one for travel... then again if it was built then we probably wouldn't have been as excited about it today