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How much does it cost to build a water rocket compared to a pyro rocket?

April 26, 2017build COST pyro rocket water

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How much does it cost to build a water rocket compared to a pyro rocket?

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Pyro rocket kits in the UK, based on a C motor and having a thin plastic chute for recovery, can cost 10 – 20. A 2 litre water rocket, made from two or three pop bottles (costing 15p each in winter or 25p each in summer) and a chute made from a bin liner and some cord will cost around 1 to make.