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Jeff sent in this great water rocket site, he writes – “All things water rocket related including some super slo-mo launch videos. Plenty of theory and practice.”Link.

Pictured here – eXtreme pinewood derby, water-rocket technology, on wheels.

Related:
Soda Bottle Rocket by Steve Lodefink. You don’t have to be Burt Rutan to start your own rocket program. With a few empty soda bottles and some PVC pipe, you can build a high-performance water rocket. MAKE 05 – Page 78.