Water Rocket Page Water Rocket Car (1:17) (4.7MB) See it here on google video This water rocket was made on a budget of nothing, using items that I already owned, or blagged from shops. Ingredients Schrader Valve (for fitting to car tyres) -> Blagged Extension pipe, with schrader quick release valve -> Blagged from PCL Air Tech - very nice people Lego - Variety of technic and standard -> already owned Bicycle Pump - This one is a high pressure one that could go up to 160psi (11 bar) -> already owned Bottle - this one is of the strongbow variety Well it's pretty obvious how it's built, but if you have any question, just contact me here. If I can be bothered, in the future I might do a step by step guide. Useful Info: I pumped it up to about 110psi, then the valve exploded, as you can see in the video. Make sure that everything is well built, as this can be quite dangerous really...but it's still fun, and building your own is way better than buying the health and safety versions from toyshops. Here's some pictures, and check out the video above.