This NOISY rocket uses 3 pressurized chambers of water and air pressure. Used four each 2 liter bottles to make this. Each pressure chambers has it's own water reservoir. Two plastic straws are used as overflow drains so the top two chambers will flow to the lower chambers.
The water will enter from the launch tube to the top chamber and fill until the water drains through the straw to the second chamber. The process is repeated for filling the lower chamber.
Later when the air is added, all chambers will equalize in pressure because of the straws venting the air.
Check out the Modified 3 Chamber Rocket
