Fish tail propulsion

[Jim Dodd]

Interesting method of propulsion !
http://www.offcenterharbor.com/videos/harry-bryans-thistle-a-pedal-powered-fin-boat/

 

[Muskrat]

Harry Bryon has some interesting inventions. I like his wheel barrow dingy that he can roll out when the tide is low too. Also at offcenterharbor.