Easy to assemble metal water rocket launcher with a 125 PSI safety valve. Rocket will NOT fly straight without an aerodynamic nose cone made from a second soda bottle and use only 1 cup (200 ml ...

Building this launcher is simple if you already have a mill. It does a remarkable job of pressurizing and launching soda bottles which are partially filled with water. The main component of this ...

Normally when we run across a project that claims to be overengineered, we admit that we get a little excited. Such projects always hold the potential for entertainingly over-the-top designs ...

There are no customer satellites aboard the first Spectrum test flight. The rocket will climb into a polar orbit from Andøya ...

When the rocket is released from the launcher, the high pressure inside the bottle equalizes with the air outside, pushing the water out through the hole in the bottom, propelling it forward.