Re: Organo-gel rocket fuel
- From: Frogwatch <dbohara@xxxxxxxxxxxxxx>
- Date: Wed, 2 Dec 2009 18:39:27 -0800 (PST)
On Dec 2, 5:51 pm, Jack Linthicum <jacklinthi...@xxxxxxxxxxxxx> wrote:
On Dec 2, 5:47 pm, Jack Linthicum <jacklinthi...@xxxxxxxxxxxxx> wrote:
On Dec 2, 5:20 pm, Frogwatch <ohara...@xxxxxxxxxxxxxx> wrote:
On Dec 2, 4:45 pm, "Keith Willshaw"
"Dean" <damark...@xxxxxxxxx> wrote in message
On Dec 2, 10:13 am, Frogwatch <ohara...@xxxxxxxxxxxxxx> wrote:
Organo-gels are like hydrogels being a cross linked network of aCongratulations, you have reinvented the Space Shuttle SRBs.
polymer immersed in a solvent or other liquid.
So.............why not a hybrid rocket engine consisting of a gelled
fuel (polymer) whose pores are filled with an oxidizer liquid such as
nitrous oxide. The gel would be used like in a solid fuel engine but
the engine would operate similar to a hybrid engine except unlike a
hybrid it could nto be shut down because you cannot shut off the
oxidizer. However, it would get better burning rates because the
oxidizer is pre-mixed with the fuel.
He's good at reinventing stuff :)
Hybrids do need better burning rates. In fact, NASA did a study in
which they found that using parraffin as fuel with LOX as oxidizer
gave better rate because the melting paraffin boiled off at the
surface producing tiny bubbles that had more surface area exposed to
My original idea was to fill the paraffin with a material like
Kerosene in tiny bubbles so that it would evaporate as soon as the
flame front got near it causing the surface to explode outward as a
liquid. I even managed to produce the paraffin with tiny bubbles it
it. When I sliced the hardened paraffin you could see the bubbles
under a microscope and the kerosene would ooze out.
Perhaps the right way to approach this would be to use an organic gel
as fuel with oxidizer fed normally. The organic solvent would do what
I wanted the bubbles to do. That would preserve the advantages of the
anyway you need to record your sources
Good Job Jack, that Science Daily article was my starting point and
then on to the work at Stanford and a private company. I have it all
in this mess of papers under my desk somewhere and in my patent app.
BTW, ooze is correct because the bubbles are so small that there seems
to be some attraction between the fluid and the paraffin.
Of course, trying to pump kerosene thru tiny holes in copper pipe
immersed in hot wax on a hotplate was sorta scary even with somebody
standing by with a fire extinguisher.
We also found some fluoriscene dye that would mix with alchohol that
we mixed the same way with the wax. The very bright dye stayed in the
alcohol and the wax stayed white so we had tiny very bright orange
bubbles that could be seen very clearly under the microscope.
I had no funding to try that stuff and having no experience making
rockets my chance of getting funding was nil so I had to drop it.
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