The author's son and his friend created the rocket and took it to a field for testing. In the video, the friend's air pump fills the bottom of the bottle with air. After the rocket is filled with ...

The core task is to pump air into the partially filled water ... There are many ways to launch an air-water rocket, from the simple to the complex. [Robert]’s build leans toward the complex ...

If no, make sure the valve can open to let air through from the pump. It may be damaged or screwed shut. If the rocket does fly but not very well, there are things you can adjust. The amount of ...