Also the fact it either needs two types of engines(subsonic to get to
'scramming velocity') or needs to be 'dropped at speed'. IIRC Lockheed
was/is designing a modular 'fan-->scram-->fan' engine(s).
Main payload _fuel_! :-D
------------------
>'scramjet'?
>
>That's a ramjet where the fuel and air mix and combust while the incoming
>air is still moving supersonically, in sharp contrast to the ramjet
>operation (as outlined above). The reason it's taking so long to build a
>scramjet is that mixing and supersonic flow are damn near mutually
>exclusive.
>
>- Eric.
!ooW %-)
Pres. of Los Angeles Newton Users Group!
lanug2000_at_yahoo.com
http://groups.yahoo.com/group/lanug2000
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