Randall Clague wrote:
> 
> On Mon, 24 Feb 2003 12:59:23 -0500 (EST), Henry Spencer
> <[EMAIL PROTECTED]> wrote:
> 
> >The attraction is an Isp of 3000-5000s with respectable thrust, enough
> >to accelerate a realistic vehicle at maybe 0.1G.
> 
> Is that a typo?  3000 to 5000 seconds?  That's 30,000 to 50,000 m/sec.
> That's enormous.

I don't think that's a typo... evidently gas core nuclear rockets would 
have even higher Isp than solid core types (which have been tested to 
~800-900 sec.) - being able to heat the H2 to higher than 2000 K or so
without worrying about melting the core is probably the dominant factor
in that.

-dave w
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