Ken, imagine my surprise when it was pointed out to me several years ago.

I was working on the F-4 and F-15 where down tail load was needed often to the point that MD put the inverted slat on the horizontal of the F-4. You tend to develop a mind set of down tail. I would pick up a model, see the big motor on the nose, and not thinking much about it conclude the tail had to balance it (well it does weight wise but not aero wise which is what I was thinking). I was flying rudder only contest ships with big negative tail settings and forward CG and it seemed totally impossible to have an up load.

I have to admit it was like hitting a brick wall, I had to ask my self why had I missed that, it seems so simple.

Oh well, life continues to be interesting.