242 seconds is ambitious for a first effort.
First make it safe. Forget about Isp, your goal is making fire without
making shrapnel.
Then make it work. Forget about Isp, your goal is making supersonic flow
without making shrapnel.
Then make it work better. You probably hit 100 seconds in step two. Try to
hit 200 seconds, but remember, Reliability Is More Important Than
Performance.
-R
On Monday, September 12, 2016, Dillon Wessing <dillonwessing@xxxxxxxxx>
wrote:
Hi all. I am the lead of the USC Liquid Propulsion Lab. We’re developing a
LOX / IPA engine and wanted some input/advice on our ground testing P&ID.
Just some general specs for the engine. 10 kN of thrust. Total mass flow
4.2 kg/s (fuel: 1.91 kg/s, ox: 2.29 kg/s). Chamber pressure 350 psi.
Pressure going into the injector 437. 5 psi.
We are having channels milled into our combustion chamber for regen
cooling with the IPA and will have a separate reg for the ox since the IPA
will have higher pressure drops. Please comment on the validity of this
design and any concerns that we should keep in mind.
Best,
Dillon Wessing
