Steve J wrote: > My primary motive is to minimize the aft CG shift (when the second > trusting soul comes aboard) by relocating the seats closer to the CG. > Ideally the variable payload should be on the CG, but that is the price > of side-by-side seating.
You might be going to more trouble than you need to. The KR2S, when built without the plans located header tank, will not have much CG shift. I forget the exact number, but mine with wing tanks shifts less than two inches from empty fuel light pilot to full fuel with heavy passengers. I think Mark Jones said his was closer to an inch the other day. Bill Clapp basically built my airplane (aerodynamically) and he says he flies all regimes and speeds with his trim tab moving no more than an eighth inch, so trim isn't a big issue in the new KR2S generation with wing tanks only. Mark Langford, Huntsville, Alabama see homebuilt airplane at http://home.hiwaay.net/~langford email to N56ML "at" hiwaay.net

