But honestly, if you make something vaguely rocket-shaped with fins ... had already suggested making the pressure vessel with carbon fiber and doctoring the water mix to make it denser.

Michely constructed a simple device: a strong-walled pressure vessel with a valve and a nozzle at one end. When used as a rocket booster, it is filled with 66 Ibs. of water heated electrically to ...

Practise and challenge your friends! Download the Water bottle Rockets PDF(378 Kb). Adobe Acrobat is required. SAFETY: This rocket uses air pressure to fling a bottle at high speed 20–50 metres.

The problem with a lot of these water bottle rocket projects is that they leak ... thing as it’s almost impossible to build up enough pressure to cause the bottle to fail. This system has ...

The rocket is part filled with water, and air is pumped in with a foot pump. When the rocket is released from the launcher, the high pressure inside the bottle equalizes with the air outside ...