Fish tail rudder or yuloh? anyone seen anything like this?

[newinertia]

Well I needed to fit the boat with eigther human power or a trolling motor for a backup form of propulsion- I have been mulling this design over for a few years now and yesterday morning i decided it was the time to build one, so with only the parts and supplies I had on hand, I built this.....
The tuna fin pushed me at 1.6 mph on gps, boat is filled with a weeks worth of food and clothes, stove, 5gal water, 5 gal gas, 17hp Kohler engine, toolbox..........etc. Id say she is a fine shantyboat! the outer hulls are Hobie Cat 16, center hull is a Catalina 15 Capri. Spars under deck are 304 stainless 2"x2"
Also- this was a float test for the amas and main hull, c/b wt/balance.
Special Thanks to Mindy- my girl.