Hi all! Me and a team at university are attempting to design a high-payload R\C aircraft. What we need is an ultra-high lift airfoil, to be able to be competitive and take-off in the space that the competition requires (there are also limitations on wing surface, a fixed type of electric motor, etc...). We came across the S1223 that apparently outputs a mximum Cl (@stall angle of attack) of about 2.2. Is there anything higher??