In article ,
says...

http://www.kurzweilai.net/is-this-th...the-jet-engine

Have I not heard this all before somewhere?

Just as we've heard for decades that clean, cheap, fusion power is only
a few years away.

Jeff
--
"the perennial claim that hypersonic airbreathing propulsion would
magically make space launch cheaper is nonsense -- LOX is much cheaper
than advanced airbreathing engines, and so are the tanks to put it in
and the extra thrust to carry it." - Henry Spencer