Originally Posted by XR219
Ah, so the real problem is that the CG is in the wrong place? Isn't that a bit of a "schoolboy error" when it comes to designing aeroplanes?
Well, yes and no. Getting the cg in the wrong place for a new design is something of a howler and would (or should) result in red faces in your advanced design/configuration design/whatever design bods who do the initial design.
But when faced with a stretch/development/legacy programme, where you're being told that you have to re-use old components and minimize (costly) redesign whereever possible, it's very easy to end up with the cg in the "wrong place" - because the traditional fix at initial design is to move the wing, so that the cg is in the right place, and moving the wing on an existing design is not cheap.