Honestly I have no idea.
At least not without some more information. How much does it weigh, is it a planing hull, expected top speed etc. You might just have to try it with e.g. a 13" prop, record your WOT rpms and then go from there.
At least not without some more information. How much does it weigh, is it a planing hull, expected top speed etc. You might just have to try it with e.g. a 13" prop, record your WOT rpms and then go from there.