Arrow Cat foiler-Single Centered Main Foil

Very interesting small cat design. Not only does it have a centered single main foil-it does not use rudder hydrofoils.
The only cat that I've run into similar to this in any way was the much larger "Happy Feet" that had a single main foil and a single rudder foil with a twist: both foils were able to slide athwartship. Both were also retractable.
Heres a little info on the boat: http://www.catsailingnews.com/2014/01/foiling-for-all-budgets.html#more
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