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 ...

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 EZ-Launch bottle rocket launcher has an internal spring ... a quick pull on a nylon cord Will handle up to 100 psi. of air pressure Suitable for children 5 years and older.

Release the pressure in the bottle by tapping the ... then you have almost everything you need to build and fly a Water Bottle Rocket. Watch Yan's video activity guide and have a go.