I can't really think of a reason why the piston returns to the original position!! any ideas?? I made a transparent QEV coaxial cannon out of the preform of a bottle. This was inspired by a Nighthawkinlight's project, although I added a transparent barrel and had to make everything work with a wooden piston and o-ring seal. The breech seal is just a piece of rubber from the inner tube of a bike tire. Thanks for watching!

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First rain in my new canvas boat tent- Nov 2017. Check out my channel for more sailing videos. Like and subscribe to see more like this. Feel free to offer suggestions for new videos.

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Estrenando Canoa nueva en el Puerto de San Isidro

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