In an era where we can watch rockets land on their tails Buck Rogers-style live on YouTube, it’s difficult to imagine a time when even the most basic concepts of rocketry were hotly debated.

Rocketry is wild, and [Foaly] is sharing build and design details of the Cortex 2 mini rocket which is entirely 3D printed. Don’t let that fool you into thinking it is in any way a gimmick ...