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increase your laptop volume lol. The video volume is fine

@@khangau4844 no, I watch other videos, and if he can’t be bothered to edit videos properly I won’t watch

An awesome team led by an awesome lead :)

Totally agree!!

I'm not sure we would want to share a straight up schematics, but we are willing to talk more about it if you like! A lot of the engine is designed specifically for what we want to do. So we start out defining a thrust level we want. Next we chose what fuel and what oxidizer we wanted (in this case paraffin wax and nitrous oxide). From there, we used Rocket Propulsion Analysis (propulsion-analysis.com/index.htm) to get fuel and oxidizer flow rates we wanted based on our fuel and oxidizer choices and the thrust we specify. From there, everything else is sized. As a rule of thumb, I would stick with using ball valves whenever possible (not solenoids) and get something to actuate them. Electronic valves can be really expensive ($300) but we were able to do this with a bit of 3D printing and a high torque servo we had laying around with a high pressure (usually hand turned) ball valve. Check out these books to find out more (you might just be able to find these on the internet ;): Fundamentals of Hybrid Rocket Combustion and Propulsion by Chiaverini and Kuo Rocket Propulsion Elements by Sutton and Biblarz Modern Engineering for Design of Liquid-Propellant Rocket Engines by Huzel and Huang The most important part out of all this is to take your time. This engine has taken a bit more time than we wanted, but not a single person has been seriously injured as a result of us taking our time and just being safe. I hope you take it slow and always make your own choices. Don't just do what I, or anyone else says, understand why. (Oh, and our rocket has an injector, a precombustor region, a fuel grain, nozzle, and motor casing along with a lot of custom parts, so maybe you can start looking into those parts specifically as opposed to just looking at ours) Stay safe and have fun! Keep us updated!

Illinois Space Society thanks for the reply! What’s the best way I should contact you guys, if I would have a few questions?

You can email us at iss.ae.illinois@gmail.com

Oxidizer was Liquid Nitrous Oxide!

Illinois Space Society Thank you for your response

We haven't gotten any data from the engine yet. We are planning on having another test fire with load cells and pressure sensors in the coming weeks to get accurate data readings and a thrust curve for the engine. The combustion instability and sputtering is most likely caused by flow rate issues with the Nitrous Oxide. The team is currently looking into modifying the injector plate of the engine to address this issue.

Illinois Space Society Awesome! If possible,take a look on the pre and post-chamber dimensions. Maybe there is some relation between your combustion and the size of the chamber. Nice! Thanks fot the reply:)

Okay we'll definitely look into that. Thanks for your input!!

@@IllinoisSpaceSociety Who are you guys im In illinois and interested in this stuff. been interested since I was 3 but Im in 7th grade so is their like a group of you?

INEX not to be dismissive of you or this group, but there are many ways a kid like you can get into rocketry. Build a Estes kit, and then a couple more. Build an aerotech mid power kit, and then when you turn 14 you can get your high power junior 1 cert. then you can fly substantially big rockets and get way better results than this. Hybrid testing is definitely not for someone of your age.