A prop that should work on a trolling motor. The mounting hole has to altered to whatever model you have, those are in the begining and commented out.
During the scetion where the mounting hole is removed from the solid part, I would reccomend removing a triangle so that the ends of the prop come to sharper point so that there is less surface area pushing through the water and the blade still has this amount of thickness. THat'd be a version 1.2 type thing in improvements. This hasn't been tested yet, I plan on doing that spring 2015 when the ice leaves.