This is wierd looking, huh?

I put a Two Blade Prop on the boat for sailing performance. It vibrated a bit too much, but more importantly I had a bit of a hard time controlling the boat. I'm sure with time I'd get it worked out, but right now the boat's brand new and I want to eliminate variables.

This is a "Campbell" prop, from Canada. Practical Sailor says it has the low drag of a two blade, but increased performance in forward and reverse due to the airfoil design. We'll see. They recommended I drop the pitch from 12 to 9.