Arnold Pieper wrote:

When you consider the glider as a whole, as opposed to the isolated wing,
there is something called the "Neutral Point", which is the point where the
Lift vector acts considering all aerodynamic forces acting on the glider,
and it too does not move with AOA.
The CG must be always ahead of this Neutral Point, and the Horizontal
Stabilizer/elevator is what keeps them balanced.

Yes. Now I better agree ;-)

The CG must be always ahead of this Neutral Point (the whole glider
Aerodynamic Center) - although the CG may be *behind* the Aerodynamic
Center of the wing (and is actually behind, except in far forward CG
position - or in tailless designs)

--
Denis

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