I just ran TiH2 with N2O and at TiH2:N2O of about 42:58 isp calculates as 234
s. A lower amount of TiH2 might give higher Isp but Propep vomited and went
crackerjack, saying "No Convergence, do not trust results!!!" at all lower TiH2
proportions. I obeyed. :-)
[I know Propep's results are to be taken with a grain of salt but it's still
fun to play with, 25+ years after I first tried it with Gordon Campbell's
horrible DOS front end.]
I had not thought about the safety aspects of TiH2:N2. If it can be ignited
with reliability and will sustain combustion it might be a viable combination.
It's possible that results might vary significantly from one batch of TiH2 to
another, as it's a nonstoichiometric compound.
Best -- Terry
________________________________
From: arocket-bounce@xxxxxxxxxxxxx <arocket-bounce@xxxxxxxxxxxxx> on behalf of
Henry Spencer <hspencer@xxxxxxxxxxxxx>
Sent: Sunday, March 14, 2021 7:12 PM
To: arocket@xxxxxxxxxxxxx <arocket@xxxxxxxxxxxxx>
Subject: [AR] Re: TiH2: useful in rockets?
On Sun, 14 Mar 2021, Terry McCreary wrote:
FWIW on a quick series of runs with Propep 3, optimum Isp is just under
160 seconds for a TiH2:N2 ratio of 75:25.