Sport_Pilot

My DR1 was scratch built from my own planes. I am kinda new to this fourm stuff. But I have just uploaded a right side view of it to my photo gallery. Not sure yet as how to insert a pic into one of these replies.

As for the difference between to Clark-Y and the Under-Cambered airfoil. I would have to say that the Clark-Y is probably more stable than the later. But it does generate a great deal of lift.