A nice video from Scott Manley explaining rocket injectors, worth a watch!
Video Caption: Rocket Propellent Injectors are critical parts of the engine design, they take the propellents and mix them so that they can quickly burn in the combustion chamber. Injectors can make or (literally) break a rocket design, and over the years we’ve seen rocket engines move from injector plate designs to more efficient options as engineers have come to understand what works well.
Thanks to Copenhagen Suborbitals for sharing some video of their injectors being tested, I hope to get to see some more flights with these: https://copenhagensuborbitals.com/
The student team from Denmark built and tested a 3D printed liquid rocket engine to compete at the Spaceport America Cup. Running on Nitrous oxide and fuel, the latest round of testing saw the engine produce 2500 N of thrust at a chamber pressure of 15 Bar and O/F of 2.5.
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.
Video Caption: Today we talk about how we design the nozzle!
Links: Arocket Mailing List: http://www.arocketry.net/forum.html
Translation of Ievlev Paper: https://apps.dtic.mil/dtic/tr/fulltex…
Nozzle Design by Method of Characteristics: https://www.researchgate.net/publicat…
Video Caption:MASA successfully conducted a second hotfire of our LOX ethanol liquid engine on May 1st. The PT-163 engine produced 2200 lbs of thrust.
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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!