Minnflyer or some one probably has the scientificly correct answer, but here is my observation from experience with my Cubs compared to my other planes. It seems to me the wing span is as long or close to the same length as the fusalage and I think this may be part of the ground handling problem. Using my best redneck analogy, its kind of like the difference between a short wheel base pick up truck and a long wheel base truck. Short wheel base truck is squirely and easy to lose control when you slide around a curve, but a long wheel base truck will track better and straighten up a little easier.
