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Rocket Launcher Answered

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I need ideas for the firing system for a rocket launcher. I have some pictures of what i have built. But i do not have a firing system for it yet. Any ideas would be appreciated. This is a knex rocket launcher that used the Air Ball Tower tubes.

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bobbyk881 (author)2007-04-10

that is cool!!!!!!!!!!! pppppppoooooosssssstttttt

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