But pointing out that lightweight cardboard tubes can be tricky to ship without getting crushed, [Concrete Dog] has come up with HEXA, a clever model rocket kit that uses pre-scored cardstock instead.

It’s an extremely impressive piece of kit, and hopefully [Rocket Moonlighting] will release the CAD source so we can make our own. EDIT: [RM] tells me his engine cost less than $2000 to make.

The seventh test flight of the rocket ... engines and rocket systems. How small? Small enough to fit in a backpack: Estes is a storied company dating back to the 1950s, known for its model ...