There are plenty of non-energetic and energetic oxidizers that don’t contain
the perchlorate anion available. Most of them have issues. My favorite has
always been HNF, primarily for its entertainment value. Most of the propellants
we made with it had a Kn of well under 50 without smoke and much noticeable
flame. ADN which is hygroscopic as hell, tends to be become more unstable as
you dry it. This complicates matters when using traditional binder chemistries.
A late associate of mine found a possible work around by using Poly
Dicyclopentadiene (PolyDCPD) as a binder. It was also successfully compounded
with aluminum hydride which tends to become offended by OH groups found in many
cure chemistries. Unfortunately, like many other cool propellant ingredients,
PolyDCPD is not without issues either. ADN and HNF co-crystalize with many
other oxidizers quite well, providing they are compatible. I once had the
bright idea that ADN and H2O2 would make a great mono-propellant and oxidizer.
They do, immediately upon coming into contact unfortunately.
Aluminum lithium alloy is an interesting fuel component in small motors due to
its increased combustion efficiency. Amorphous silicone has also been
demonstrated to work well in this regard. Even though it has a lower
theoretical specific impulse than aluminum, its demonstrated impulse can be
higher again due to its higher combustion efficiency. When we were evaluating
lithium aluminum alloy, we had difficulty finding it in the desired percentage
ratio and then finding someone who would atomize and classify to a desired
spherical grade. It will be interesting how li/al runs in larger motors when
Adranos gets the opportunity. Many of these combinations improve performance in
smaller motors but start to deliver diminishing returns as the motors become
larger. As far as aluminum combustion is concerned, I’m not aware of any
chemical that combusts it quite like HNF with its 1 micron, oxygen positive
monopropellant flame length. Still, when it comes to performance, price, safety
and mission requirements, it’s very difficult to beat the incumbent.
There are really not many chemical reactions that haven’t been tried or
considered according to Mr Clark who also points out that many fuel chemists
have worked their way out of a job in the process. It will be encouraging if
Adranos produces something successful. There’s a saying in the business,
“liquid guys always lie about price and solid guys always lie about
performance”.
Anthony J. Cesaroni
President/CEO
Cesaroni Technology/Cesaroni Aerospace
<http://www.cesaronitech.com/> http://www.cesaronitech.com/
(941) 360-3100 x101 Sarasota
(905) 887-2370 x222 Toronto
From: arocket-bounce@xxxxxxxxxxxxx <arocket-bounce@xxxxxxxxxxxxx> On Behalf Of
Terry McCreary
Sent: Thursday, March 21, 2019 8:58 AM
To: arocket@xxxxxxxxxxxxx
Subject: [AR] Re: New Solid Propellant Company
I'd be interested in seeing some hard numbers; e.g., 285 s @ 1000 psi/14.7 psi,
rather than a percentage increase. An increase of 33% over the 200-220 s of
typical hobby-commercial propellants would be around 280 s; pretty decent but
not earth-shaking. 33% over the 265-270 s for a heavily-aluminized, optimized
AP propellant would be around 350 s. Impressive indeed; comparable to or
better than many liquid propellant combinations.
Best -- Terry
On 3/20/2019 10:03 PM, anthony@xxxxxxxxxxx <mailto:anthony@xxxxxxxxxxx> wrote:
Increasing impulse by 33% over “traditional propellants” while eliminating HCl
is not very difficult. Deploying it is.
Anthony J. Cesaroni
President/CEO
Cesaroni Technology/Cesaroni Aerospace
<http://www.cesaronitech.com/> http://www.cesaronitech.com/
(941) 360-3100 x101 Sarasota
(905) 887-2370 x222 Toronto
From: arocket-bounce@xxxxxxxxxxxxx <mailto:arocket-bounce@xxxxxxxxxxxxx>
<mailto:arocket-bounce@xxxxxxxxxxxxx> <arocket-bounce@xxxxxxxxxxxxx> On Behalf
Of Troy Prideaux
Sent: Wednesday, March 20, 2019 8:47 PM
To: arocket@xxxxxxxxxxxxx <mailto:arocket@xxxxxxxxxxxxx>
Subject: [AR] Re: New Solid Propellant Company
No idea. Can only speculate – CL-20 based propellant perhaps?
Troy
From: arocket-bounce@xxxxxxxxxxxxx <mailto:arocket-bounce@xxxxxxxxxxxxx>
[mailto:arocket-bounce@xxxxxxxxxxxxx] On Behalf Of Charlie Garcia
Sent: Thursday, 21 March 2019 11:08 AM
To: (AR) ocket List <arocket@xxxxxxxxxxxxx <mailto:arocket@xxxxxxxxxxxxx> >
Subject: [AR] New Solid Propellant Company
These folks graced my social media feed today. I recognize some of the names on
the team, which is promising. Any speculation on their propellant? HCl exhaust
has caused me difficulty with the EHS people in my lab before. It'd be nice to
avoid it.
https://www.adranos.com/