Then it should be pursued as well as my ingredient that modeling indicates
a 10-15% ISP increase in a solid,liquid or hybrid. I've been looking for a
person to help join me in a simple test program to do a few BATE like hot
firings.I used to be in a situation where I could do this myself since a
few bad twists in life I've been forced into apartment life. So far no one
has had any desire to do real rocket research which could lead to a patent
which befuddles me Troy. Perhaps PPG plus X will give a 275 SL ISP, in a
solid.
Ken
On Wed, Jul 8, 2020 at 5:05 AM Troy Prideaux <troy@xxxxxxxxxxxxxxxxxxxxx>
wrote:
Ken,
I know exactly where you’re coming from, but PPG sims higher than PB AND I
can vouch that the **measured** numbers correlate very very closely to
what the sims say.
Why is PPG higher? I honestly don’t know. It should be lower. Its
enthalpy of formation is lower (which it should be). All I can think is
that the formation energy of the exhaust of a PPG propellant is much lower
than that of a comparable PB propellant, but I don’t know why there would
be such a difference.
Troy
*From:* arocket-bounce@xxxxxxxxxxxxx [mailto:arocket-bounce@xxxxxxxxxxxxx]
*On Behalf Of *roxanna Mason
*Sent:* Wednesday, 8 July 2020 5:46 PM
*To:* arocket@xxxxxxxxxxxxx
*Subject:* [AR] Re: Making composite APCP in Australia
OK kind of like alcohol and LOx, O/F is much lower than hydrocarbons like
kerosene plus the exhaust is transparent studded with shock diamonds. So is
the ISP somewhat lower than PB for similar reasons?
Ken
On Tue, Jul 7, 2020 at 10:26 PM Troy Prideaux <troy@xxxxxxxxxxxxxxxxxxxxx>
wrote:
Yes no metals within that propellant, but also, PPG has a fair bit of
oxygen itself, so it’s easier to produce a smoke free exhaust than with
something like a polybutadiene as a binder which might still provide
noticeable black carbon (rich diesel looking) exhaust utilising the same %
of AP. I was able to do it with a 75% ratio of AP.
Troy
*From:* arocket-bounce@xxxxxxxxxxxxx [mailto:arocket-bounce@xxxxxxxxxxxxx]
*On Behalf Of *roxanna Mason
*Sent:* Wednesday, 8 July 2020 2:43 PM
*To:* arocket@xxxxxxxxxxxxx
*Subject:* [AR] Re: Making composite APCP in Australia
"no smoke"
Do you mean no aluminum?
On Tue, Jul 7, 2020 at 8:45 PM Ben Brockert <wikkit@xxxxxxxxx> wrote:
On Tue, Jul 7, 2020 at 8:19 PM Troy Prideaux <troy@xxxxxxxxxxxxxxxxxxxxx>
wrote:
BUT, the catch is the processing. You need to invest in the processingkit or get real clever with the chem.
Are you willing to go into any more detail, or is "process it at
temperatures and pressures that preclude the existence of water" the
crux of it? it being higher performance, full density, and no smoke
make me surprised that it isn't more common.
Thanks,
Ben