I would have no problem with a "standard" wing, with constant chord or a swept LE/TE. But with the entire wing panel swept back about 7*, I have no clue. I Need to hear from Ted or Brett, I guess, they may know a formula to use for a swept wing panel
Bill-
I haven't posted much recently, but if you do a search on either SSW or SH forums, you'll find several of my posts on this. The main point I'd make is that you do
NOT even have to calculate these things yourself. Some RC and other sites have calculators on line, where you just enter your model's dimensions and they feed you the answer. I see that the best RC site says that they have a virus and will not display their page now, but the Palos sites are still up:
http://www.palosrc.com/index.php?option=com_content&view=article&id=51:mac&catid=41:ic&Itemid=50http://www.palosrc.com/index.php?option=com_content&view=article&id=50:cg&catid=41:ic&Itemid=50They've taken down their A.C. calculator, but you can use either of these to find your answer. For the aero center (AC), just keep varying the CG position until the % MAC reads 24% or 25%. That root position will give you your longitudinal AC position. Then you vary it to get the % MAC you desire for your CG or just use the CG calculator for that.
If you really want to calculate the AC position yourself, I'll send you a PDF version of my derived formulas (illustrated) for several combinations, including straight or swept (fore or aft) tapered wings, elliptical wings of varied types and sweep, and some others. I offered them on the forums when I derived them years ago, but no one was interested. Regarding the elliptical, my derivations are correct, while some given as "gospel" on the internet are not. If you'd like these formula sheets, just contact me off-forum with your current e-mail address, and I'll e-mail them to you. I think the Palos site is what you want though, unless you have more complicated shapes. Approximate the tips; the answers will fall within the errors of the understood simplifications inherent in the assumptions used.
SK