I have a twenty foot double that I want to add a little electric engine to that is part of the rudder system. The speed control will be mounted in the deck, battery midship, but I want the kayak to otherwise hide the fact that I am cheating with a propeller. The engine gives 36 pounds of thrust, but weighs close to 15 lbs. Due to the weight I want to design a simple rudder that can withstand the additional stress of something that size. It will need to be able to swing up to be out of the water of course, which will demand a lot of strength from the mounting. I fear that a stock rudder would not be able to withstand the pressure. Maybe I am wrong. The boat has a sharp stern Anyone have any thoughts on this?