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Re:Nuclear-powered passenger aircraft 'to transport millions' by josefresco on Monday October 27, 2008 @02:32PM (#345372)
http://en.wikipedia.org/wiki/Project_Pluto

The ramjet lives on, but it's not nuclear powered, and don't they call it the 'scramjet' now?

Re:Nuclear-powered passenger aircraft 'to transport millions' by hugh on Monday October 27, 2008 @04:37PM (#345550)
A scramjet (supersonic combustion ramjet) is a variation of a ramjet with the distinction being that some or all of the combustion process takes place supersonically.

(from wikipedia on Scramjet)