The cable is a made of strong, corrosion resistant Stainless steel . Low friction cable guides carry the cable inside the kayak bulkheads and through the deck. This ensures watertight seal. The whole system weighs under a pound and works flawlessly. The stiff blade is not quite a NACA 0015 section shape but is more effective than flimsy plate of aluminum.
Bigger angles result in flow separation and stalling.
Plans , Kits and footbraces for this rudder are now available.