UStik, BMatthews

I suspect that SM in most of the small programs have not included for fuselage, hence strange figures. Yes, i use the Plane Geometry spreadsheet and i have used it for a prototype design which have been flying for a couple seasons, and it flies very good with CG at 25% and SM 25%. UStik, try to reduce/increase stab size and watch what happens to figures simular to the ones in my post. If I should have used a very low SM (0-5%) the following would go abselutely crasy; Short Period Pitch Damping =0,89
and any pull outs from say vertical would be very difficuld to perform without overshuting(Fig 12 page 22). Further i suspect that horisontal flying would be difficult due to very very small stab.

Further I think a SM @ 25% is not GROSS for a pattern model, where some people wants to fly at SM @30% or so with its concequences.

Best regards