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(29 votes) Published: Nov 04, 2001 12:00 a.m. Viewed 1003 times
inventory
1) 1x 2 litre plastic bottle
2) car valve
3) 8mm drill
4) pump (compressor works best)
5) a tube that the bottle will loosely fit in to make a launch tube
method
1) drill the lid of the bottle.
2) pull the valve through the hole, oil will help.
3) fill the bottle with water to about 1/4.
4) place bottle into launch tube.
5) put pump or compessor onto the valve (quick relase ones work best)
6) inflate as much as the pump will go, about 140 psi works good.
7) when fully inflated relase pump and watch the rocket go about 200ft high.
notes
the more water you use the longer it will last, the more air the better it will launch. 190psi 25% water reaches about 350ft. experiment with the combinations.
contact me if you want to know how to make a nose cone to add another couple of hundred feet
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