Download the Water bottle Rockets PDF(378 Kb ... until the cork pops and the bottle flies away. Here's a simpler design using a pump that has a needle for inflating things like rugby or soccer ...
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 ...
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