Make a launchpad that holds the bottle with the neck downwards, lets you attach the pump and stand behind the bottle. One good method is to plant a spade or garden fork in the ground at a low angle ...

Eighth and ninth grade students worked in teams to design, build, and launch water bottle rockets, learning about propulsion and altitude calculation in the process. “Hopefully they're having a ...

Download the Water bottle Rockets PDF(378 Kb ... until the cork pops and the bottle flies away. Here's a simpler design using a pump that has a needle for inflating things like rugby or soccer ...