Hi Alasdair, I have designed a Corben Super Ace, which has a low wing loading, about 1/2" dihedral under each wing, CG at 25%. The wing section is Clark Y with the bottom at 0 degrees so the chordline is about 3 degrees positive. Two degrees down-thrust on the engine. Span is about 50", power is a 30 FS. Control throws are: ailerons 1/2", rudder 3/4", elevators 3/4" (all each way), and there are no warps or control gaps. In flight the elevators are not at all sensitive even at those large throws. The Corben flies perfectly well using coordinated ailerons and rudder, just a touch of rudder and normal aileron and it turns like any other model. Now the puzzle. The ailerons on their own are quite ineffective. Apply aileron alone and nothing happens, occasionally one gets a slight aileron reversal, but the rudder is quite sensitive. Turn the model by using aileron and a touch of rudder for a coordinated turn and it turns quite nicely. With so little dihedral this does not seem correct.
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机译：嗨，阿拉斯代尔，我设计了一个Corben Super Ace，它的机翼负荷低，每只机翼下约有1/2“二面角，CG为25％。机翼部分为Clark Y，底部为0度，因此弦线约为正面为3度。发动机向下推力为2度。跨度约为50英寸，功率为30 FS。控制投掷有：副翼1/2英寸，舵3/4英寸，升降舵3/4英寸（所有方向），并且没有翘曲或控制间隙。在飞行中，即使在大投掷时，升降舵也不敏感。Corben使用协调的副翼和舵，只有一点点舵和普通副翼，飞行得非常好，它的转动像任何其他模型一样。现在的难题是，副翼本身是无效的，单独使用副翼并没有任何反应，偶尔会稍微改变副翼的方向，但是方向舵非常灵敏，通过使用副翼和方向舵的一点来协调旋转模型，它会很好地旋转。
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