It’s a great way to send a water rocket ever higher, but [The Q] didn’t stop there. The build was also fitted with a wind-up module from a little walking toy, colloquially referred to as a ...

they can also be used to provide a large amount of hot water to something like an off-grid home as well. [Little Aussie Rockets] starts off the build by fabricating the feed point for the fuel out ...

Look for air bubbles in the water when you pump. If no, make sure the valve can open to let air through from the pump. It may be damaged or screwed shut. If the rocket does fly but not very well ...

DR YAN WONG:'Pumping air into the bottle 'causes the pressure inside the rocket to build up ... So try it at home. Children from Links Primary School in London investigate water rockets.