horizonal stab/elevator rib stich

[Ronin]

I rib stitched both but largely because of a Mod I made on the rudder. The top three ribs I used were made of quarter inch foam laminated on both sides with a layer of glass with sanded micro at the edges to add a smooth surface there. On the rudder, the lower two ribs were made from pairs of carbon fiber tubes fastened fore and aft with Hysol and attached together mid span with a short length of steel cable glued across the gap between the two tubes with Hysol. This was to see if changing the airfoil of these two ribs would serve as rudder trim. The rib lacing was largely to keep the fabric close to the rib surfaces as the airfoil changed. The vertical and horizontal stabilizers and elevator was laced as well for continuity.

Yes, the changing airfoil does serve as a means of trimming the rudder.

More closeup pictures please?

[Flybyjim]

This is a very interesting concept of a trim for the rudder.