[AR] Re: Cold Gas Hydrogen Thruster (Re: Roll control...)
- From: Craig Fink <webegood@xxxxxxxxx>
- To: arocket@xxxxxxxxxxxxx
- Date: Wed, 6 Jun 2018 22:51:51 -0500
On Wed, Jun 6, 2018 at 9:50 PM Jonathan Goff <jongoff@xxxxxxxxx> wrote:
Actually, gaseous hydrogen is an awful cold gas propellant because while
its Isp is decent
"awful", I think a better word would have been "very"
"DECENT", I think a better word would have been "Fantastic"
I'm not even through the first sentence and have found two sign errors.
Ahhhh.
The ISP of Hydrogen is more than decent, from 0 K to 0 C, I'm not sure that
even the Nobel gases would be better.
Let's list all the propellants with an initial temperature of 0 K and
exhaust gas temperature of 0 C sorted by ISP
1) ???????
1.2) Hydrogen ISP > ?300?
3) Helium
4) ?Neon?
...
?) Nitrogen
Incomplete and inaccurate list above.
--
Craig Fink
WeBeGood@xxxxxxxxx
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