
- Medium
- MATLAB · Ansys Fluent · P&ID
- Role
- Fluid Systems Lead — NEAL Aerospace
Remus
The injector is where the whole motor either works or doesn't.
Remus is the first motor from NEAL Aerospace, the student rocketry group I co-founded at Georgia Tech. It's a hybrid — nitrous oxide fed from a ground-side tank, through a run valve, into a 3D-printed ABS fuel grain — and it isn't a launch vehicle. It lives bolted to a test stand: the oxidizer stays on the ground beside it, and the whole point is to fire it, instrument it, and understand it. We chose the hybrid architecture deliberately, too — a hybrid can be shut off, it can't detonate the way a solid can, and it forces a small team to get genuinely good at one hard thing: moving oxidizer from a tank to a combustion chamber, on command, without leaks.
My corner of the system is everything the oxidizer touches. The injector came first: a MATLAB sizing model trading mass flow rate against pressure drop to hold a 350 psi chamber, run over and over as trade studies until the numbers stopped moving. An injector that's too soft lets chamber pressure oscillations talk back to the feed system; too stiff and you're throwing away tank pressure you paid for. When the sizing settled, I took the chamber flow into Ansys Fluent to see whether the combustion picture matched the assumptions the model was built on.
The less glamorous half of the job is the P&ID — the single drawing that names every valve, regulator, transducer, and fitting between the fill cart and the injector face. Writing it teaches you a mindset: you aren't designing for the day everything works, you're designing for the day something doesn't, and the drawing is what tells you which valve saves you.
Remus is now moving through component procurement toward cold-flow and static-fire testing on Ostia, the stand we built for exactly this purpose.

