So, what about the design of these T-Foils?
1. Symetrical, can they be fairly flat?
2. Near the bottom of the rudder.
3. How much surface area?
4. Triangle shaped? Rectangular? High Aspect?
5. Zero angle of attack with boat level. When is the boat level? Or zero when the transom is just clear of the water?

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F16 Blade 716