The design posted back in 2016 has now been improved in many aspects. It's more streamlined, balanced, robust and optimized for speed.

This rudder combines two interesting features – avoids entanglement and reduces the power needed to steer the boat. 

Here's how it's designed on the inside. The heavy duty aluminum skeleton holds all the critical parts together.

From this point, it's going to be pretty straightforward. The next step is to make a foam hull using a CNC foam cutter and then build the molds.