I have a new, never flown Aeromaster. On others advice, I enlarged the rudder about 15%. The discussion on wing incidence is interesting. On real biplanes, Stearman, etc., top wing incidence is always greater than bottom wing incidence. Generally refered to as decalage. With top wing flying at a greater angle of attack (due to greater incidence), it will stall before bottom wing. This allows the nose to drop thereby decreasing the angle of attack, allowing the top wing to resume "flying". If bottom wing stalled first, then A/C would pitch up causing a more difficult situation. All this assuming A/C is being flown right side up.

Just info, not saying that R/C models are the same as real A/C.