The problem with a lot of these water bottle rocket projects is that they leak where the bottle meets the launcher. In most cases this is a good thing as it’s almost impossible to build up ...

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 ...

In this case, though, we’ll respectfully disagree with [Zach Hipps] assessment of his remote-controlled soda bottle rocket launcher as “overengineered”. To us, it seems just right.

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.

To assemble the stomp rocket, place the rocket on the end of the launcher. Then stomp on the 2-liter bottle to see how high your rocket goes! We can calculate the height of the rocket using two ...