OK banktoturn,

lets get on a friendly note. I realized what I wrote after I sent it and you are correct and I am wrong in that you did enter this debate questioning hanson's theory. However, I am still correct in saying that speed does play a part in cg location. If you are flying a fast plane you would rather have the cg more forward than aft. However, we are getting into a totally different realm. A more forward cg for a fast plane in relation to a slow plane would be more desireable than an aft cg. Especially if we are trying to make a sport airfoil (which tends to have better lift characteristics than an aircraft designed and built for speed) fly faster. Most of the RC pilots out there are sport pilots and find ways of increasing performance on the sport planes they are already flying. If I wanted a aircraft that would fly balistic I would build one for that intended purpose and nothing else. In this case the cg would be factored into the overall design of the plane and would resemble the % of most other planes in the different categories.