One of my Algebro friends and I partnered up in the Rocket Royale competition. We make it five rounds!
My friend and I built bottle rockets to compete in Windham High School's first annual Rocket Royale! I was responsible for most of the designing and printing, and we both sanded the PLA fins and nosecones. I had modeled the fins after the Universal Fin Can, an open source bottle rocket fin design.
Also, we painted a leafblower decoration bottle rocket very last minute for the decoration contest (needless to say, we did not win the decoration rocket contest).
We'll be back for the 2nd Rocket Royale in 2026.