We about have our S1C ready for flight and are looking for some additional C.G. info. Our S1C has a gross weight of 1050# and at gross wt the C.G. is +1 to -4.6. Unlike the S1S which has C.G. info for weights less than gross we can't find any on the S1C.The S1S allows an aft C.G. of close to +2 at some weight less than gross. Does anyone have similar info on the S1C?
Also what moment arms are being used for the pilot and the fuel? The original builder did a weight and balance back in 1972 (using the leading edge of the lower wing as datum) and we are trying to confirm his numbers so what are you S1C drivers using?