Propul~Surf or PropuSurf, electric powered
www.gizmag.com/propulsurf-screw-propelled-snowboard/27230/
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www.youtube.com/user/Raicuuu/videos
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http://hackaday.com/2013/04/11/snowboard-propulsion-system-motors-you-through-the-flats/
http://whats-matt-building-now.blogspot.com/2013/04/retractable-out-of-way-snowmobile-like.html
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