Not all the flames went the direction they were supposed too!
The Balerion engine is 3D printed from Inconel 718, using a LOX/kero propellant combination and produces 10,008.5 N (2250lbf) of thrust. USCLPL has partnered with the Kyushu Institute of Technology (Kyutech), Japan to provide the engine for their winged reused sounding rocket project #13.
You can read more of the engine technical details here.
Continuing on with USC LPL rocket lectures, this second one focuses on the feed system design.
This side of rocket engines is sometimes not heavily covered in the literature out there so this is well worth a watch.
A great video lecture on Liquid Rocket Engine Sizing from USC LPL.
If you are struggling to get through the basics of Rocket Propulsion Elements, then this presentation is great to have on while flicking through the book!