Not a good description, and this may not be the right fourm for this, but here goes anyway

We had a guy at the field a couple days back with a discus launch glider. Every thing state of the art. What caught my attention was the controls. He used kevlar cord through the boom with a rod as a bearing on the end and a 180 turn to pull pull elevator and pull pull ruder. Very clean and not much to cause drag.

What really got me going though was the ailerons. The servos were mounted in the wing so the axis of the servo output was on the cord line. The servo was mounted at about 45 degrees to the hinge line. There was a little coupling between the output shaft and a rod that ran to the hinge line and had a bend in the end that tucked into a pocket in the aileron. There was nothing in the airflow at all. He told me the name of the setup, but like a lot of things it was gone by the time I got home. I'm scratching my head about the geometry of the pocket and bend. He claimed some guys arer using the same type setup on 1/4 scale and larger.

Any links to explain this stup? The Geometry, ETC.

Thanks
Don