I saw these on youtube the other night, Looks like a fun toy/father/son project.
http://www.nvbackflow.com/engines/
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I saw these on youtube the other night, Looks like a fun toy/father/son project.
http://www.nvbackflow.com/engines/
Those are little motors!
I was looking at some of those a while back, very cool. There is also an entire forum for these guys and some of the builds were nothing short of amazing.