It’s an automatic parachute deployment system that you build into the nose-cone of your rocket. The main portion of the build is made out of plastic soda bottles (2 liter size) to end up with a ...

Last fall, they had just successfully tested the TKL-5, a 3D-printed, 5-kilonewton rocket engine the company generated ... supersonic exhaust along a cone-like spike that extends outward.