This is the fin structure. The fin is the stationary part of the whole rudder, the rudder is the part that moves left and right to steer the whole plane. The fin here is basically just a triangle. This is made out of wood and glued together, and i’ll mount the hinges and rudder horn and support to it, and then cover it with plywood and paint it and coat it. I also welded together some of the fuselage frame. I don’t currently have a picture of it, but its made of three quarter inch steel tubing, and currently I’ve welded the front section of the fuselage, (most of it), and then i’ll finish the tail section. The frame is strong but fairly light, and then i’ll bolt ribs of wood to it and then plywood will cover the ribs.