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 ...

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 ...

Make a launchpad that holds the bottle with the neck downwards ... There are many other, more advanced, rocket designs. Some people compete in national competitions. Explore the Internet for ...