Yeah Troy, it's hard to convey a complete picture when it's all clear in my
head and trying to put all pertinent info in type w/o diagrams gets
problematic.
This was a test apparatus not a motor which was under static conditions
after filling with fluids. The sole purpose of the test was
compatibility of 98% hydrogen peroxide with nitrous oxide while under
nitrous vapor pressure at room temp,i.e. 70-80F. We had no agitation
mechanism built into the device since we had no idea that any would be
needed and hence the purpose of our research was as unexpected as it
ended up being.
I'm glad to keep answering questions until it is clear what we did 17 years
ago as long as the patience of the group isn't taxed too much as has been
the chatter lately. As aforementioned my memory is getting taxed too so
inadvertently omitting important details is possible. I was not the test
engineer nor designer so everything I say is through observation and
performing my duties in the test cell. My colleague Al was the only other
participant and was the test engineer/designer. We were near the end of the
phase 2 SBIR contract so were a skeleton crew. After we concluded this test
series we closed shop and were absorbed by the MIPCC operation 1/2 mile
south where I operated the J-79 turbojet source engine.
Thanks for being with me,
Ken
On Thu, Jul 23, 2020 at 3:46 PM Troy Prideaux <troy@xxxxxxxxxxxxxxxxxxxxx>
wrote:
Ken,
I’m missing something here, so I’m trying to put my finger on it.
Typically, with nitrous hybrids, the vent (more specifically its relative
throughput) is used to control the N2O temperature and typically works
quite effectively at that. If there are temperature variations/gradients
within a **vented** vessel, then theoretically there should be a natural
mixing and equalization of the fluid as there should also be an
accompanying variation in vapour pressure within the fluid which seems an
unlikely occurrence.
Troy
*From:* arocket-bounce@xxxxxxxxxxxxx [mailto:arocket-bounce@xxxxxxxxxxxxx]
*On Behalf Of *ken mason
*Sent:* Friday, 24 July 2020 8:23 AM
*To:* arocket@xxxxxxxxxxxxx
*Subject:* [AR] Re: Continuation of small hybrid motor design
No, if my memory serves me, which is getting more challenging with age, it
was vented. The N2O supply was a standard "K" size steel cylinder w/o a dip
tube so it was inverted in a custom made aluminum stand. The liquid nitrous
was withdrawn by opening the hand valve manually and the test apparatus was
filled remotely by a solenoid valve as was the vent valve also a remote
operated solenoid valve. Forgot to mention type K thermocouple(s) were used
for remote temp monitoring.
K
On Thu, Jul 23, 2020 at 3:16 PM Troy Prideaux <troy@xxxxxxxxxxxxxxxxxxxxx>
wrote:
Mark,
I’m assuming then we’re talking about a non-vented tank here?
Troy
*From:* arocket-bounce@xxxxxxxxxxxxx [mailto:arocket-bounce@xxxxxxxxxxxxx]
*On Behalf Of *mark.spiegl@xxxxxxxxx
*Sent:* Friday, 24 July 2020 7:05 AM
*To:* arocket@xxxxxxxxxxxxx
*Subject:* [AR] Re: Continuation of small hybrid motor design
To clarify: my issue/question is about temperature variation in the tank…
not reaching equilibrium with the ambient temperature.
--MCS