Association bringing together water rocket experimenters of all ages and skill levels through online discussions and organizing competition rules and safety standards.
Learn about water rocketry firsthand from the folks at NASA. Useful software that helps predict your rocket launches and trajectories. A section for teachers who would like to use water rocketry in the classroom.
This site documents modifying a water rocket to work as a "payload" rocket to lift a remote controlled glider to higher altitudes using a 2 liter pop bottle as the water rocket.