Reviews

• Scratch Spirogryo By Brock Freeman

  Spirogyro is a tubefin rocket that is a little different. The tube fins are arranged in a triangle instead of a circle as usual. This gives it some interesting flying properties. It oscillates rapidly and leaves a fine corkscrew smoke trail. The rocket is made entirely out of interlocked tubing, so it is very strong and easy to build. I designed Spirogyro for the BRS design contest as a 3 x 18mm ...