Arnold Pieper wrote:

The CG is ahead of the Aerodynamic Center of the wing

No ;-)

Although this is one of the most common misconception it's not true.
Except at very forward CG position, the glider CG is *behind* the
aerodynamic center of the wing.

If you don't believe me, check the CG range on your flight manual. And
compare with the mean aerodynamic chord (the aerodynamic center in all
common profiles is at 25% of the chord)

Frankly, that must have come from someone who hadn't finished
reading the whole aerodynamic book yet, and started jumping to conclusions.

You perhaps read the whole book, but unfortunately many books are wrong
(especially those destined to student pilots), in an effort to explain
the stability issue simplier, pretending that the CG must be ahead of
the wing AC...

Anyway we are well out of the subject of this thread ;-)

--
Denis

R. Parce que ça rompt le cours normal de la conversation !!!
Q. Pourquoi ne faut-il pas répondre au-dessus de la question ?