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- Jan 30, 2016
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Speaking for myself only: what they currently do / do not make / sell.
Speaking for myself only: what they currently do / do not make / sell.
THRP-1 (Tiny Hybrid Rocket Project version 1); a little more progress. I'm expecting it to be ready to burn in a week or two. That's a valve at the top, not an ejection charge well.
That's a cell phone picture, so not the best. But it should convey the general idea and status.
Remaining to be done:
Machine injector assembly - hopefully tomorrow. This is a small swappable subassembly. This first version is to use three injectors with impinging streams.
Clean THOROUGHLY. Cutting fluids and nitrous unfortunately do mix, and greatly lower the energy needed to get it to go boom. It will get acetone degreasing, then denatured alcohol cleaning, then air drying.
Cast fuel grain. Last needed chemicals arriving Mon or Tu, so should get it done by the weekend.
Cast preheater. It's a chilled nitrous motor, so the preheater is mandatory or it will have good odds of blowing itself out.
Assemble for real, using nitrous safe grease - DuPont Krytox.
Gerald
- Convection cooling for the Nitrous Tank (I fly in South Carolina so Nitrous Tank temps get dicey in the July and August)
Edward,
What materials did you use for the burst disk. Plus does it burn through or burst?
Mike K
I have an in-house draftsperson ( the missus' day job ).
Let me know if you'd like some tidying / sheet sets / normalizing done.
For me, I want to learn more detail about how they work; what, if anything, can be "fiddled with" on a certified motor without getting into EX territory. What people are doing with EX and hybrids. What the heck is a tribrid?
Etc ...
This is the open propulsion forum. Discussion of propellant formulations is not permitted.Tribrid vs. Hybrid: normal formula of fuel of t. - the fuel grain has the solid oxidizer and process of burning in the chumber begins with its ignition. After a heat of a grain submission a liquid oxidizer on the hybrid scheme is added. In my "tripropellent" rocket engine the grain is made of a "black" paraffin (with charcoal) and serves for increase in initial temperature and chamber pressure. After a small delay the main oxidizer (NOx), and then liquid fuel (ethylic alcohol, propane) begins to arrive.
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