From: Lifehacker: diy
If you've been sitting around all week wondering how you could
combine smoke, speakers, and a love of novel physics experiments
into an excuse to tinker in your workshop this weekend, building a
smoke-shooting vortex cannon should cover everything nicely.Over at
Make, the DIY-centric magazine, they've put together a video
tutorial on how to build your own vortex cannons. The first cannon
is essentially a super size version of the DIY Airzooka we shared
with you years ago—bigger is better! The second model they
create however is powered not by an elastic membrane stretched
across the back of the tube but by the kick of a big speak...
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