Rudders compared

As the photo shows, the new rudder profile is quite different from the old. The copper patch is where the outboard prop is, so this rudder won't be getting chomped so much. Hopefully.

I haven't done any math on it, but it looks to me like they'll both have about the same area underwater. I placed the ruler where I think the waterline will be.

The difference will be that a smaller percentage of the new blade will be out of the water when the boat heels. The foil shape will hopefully boost performance. And the rudder won't be acting like such a brake when turned hard over.