Some very good points, how's the flying been with the Eglin Aeromodellers Ed? I sure miss flying with the crew down there. This is what brought up the question, I flew one of the TF DC-3's when they first came out, it had a pair of .46 2-strokes on it, I was not happy with the scale flight speed of the aircraft, it was very stall happy at scale speeds for a DC-3. Recently, I test flew one for a buddy of mine, it has a pair of .25FP's on it, took a nice long take-off roll but flew so much better (scale flight speeds were easier to obtain without a snap tendency) than the first one. Both aircraft were built by superb builders, I'm not sure what the weight difference was between them. Another design, I'm sure all have seen the RCM Twin Otter plans (80" WS), the fuselage on this plane is the size of a small coffin (about as big as my 31% edge fuselage), the wing chord is only 8", the plane calls for a pair of .30's (not 30cc). The flight report claims that it can fly on 1 engine and maintain a slight climb. Maybe it's the high aspect ratio wing and the huge tail fin, but what about the 9 to 10lbs of weight?