Perhaps part of the confusion here is out different perceptions on what 'stability' means. Stabilityin aerodynamic termshas a very specific meaning, as i tried to explain in my previous post,butthereare various types ofstability, longitudinal, lateral, directional, and different stability modes; static and dynamic.

What I've been talking about is static longitudinal stability. Dynamic stability is a different animal and while i cant see any obvious reason why decalage should effect it, dynamic stability is a complex field and these things are always possible.

Bear in mind in all of this that the original poster was asking why two 'identical' models (that presumably, being 'identical'have identical decalage) behaved differently to elevator input. It was not about pylons racers or stability with aft CG's or any other of the tangential directions the discussion has taken.

Steve</p>