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Make a simple cannon out of some tube and a vacuum cleaner.
Find a length of tube. PVC or cardboard tube will work. Make sure you will be able to hook up a vacuum to somewhere on the tube, but not the end hol...
Cut a hole somewhere near the end of the tube. Attach the vacuum to the hole. I chose to use another length of PVC to run from the PVC barrel to the...
Place the tube on a horizontal or angled surface. Put the ball in the tube, then press something (newspaper, plastic, etc.) on each end. Start the v...
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What would be the best way to put a one way valve on the barrel, so that the barrels seals after each shot but doesn't interfere with the projectile too much?
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