>From a safety standpoint, its probably a draw between HTP and
LOX.  From a 'fuel' cost and Isp standpoint, LOX is probably the
winner.  From the density impulse standpoint, 99% HTP/kerosene
will probably beat LOX/kerosene.  If you consider that HTP can also
be used for the RCS engines and could be utilized in a fuel cell for
in-orbit operations, yielding O2 and water, it *could* be the
overall winner.  I've also heard that frozen HTP has a density of
1.7 gm/cc (I should check this).  If the oxidizer tank could hold
frozen HTP instead of liquid HTP, that would greatly increase 
the density impulse.  But, you'd need to weigh the extra complexity
of liquifying it before it heads for the engine (some sort of heat 
exchanger system between the engine and tank). 

BTW, how much is LOX in large volumes?

Dan

In a message dated 6/22/02 7:01:22 PM, [EMAIL PROTECTED] writes:

<< On the other hand, I feel that designing a new vehicle to use tons of it
at a time, several times a day, is not reasonable. >>

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