Gary Drescher a écrit :
"Grandss" grandss@nospam wrote in message ...

Ok if someone could explain me that, I will be very happy

I have a simulator, if i pitch up OK, but if I pitch down, my plane stalls
and i don't understand why.


It should be just the opposite: pitching up too far can cause a stall, but
pitching down is supposed to *recover* from a stall.

So there are two possibilities. Either the simulator is flawed, or else
you're mistaken to think that the plane is stalling when you pitch down. Can
you tell us exactly what the plane does that leads you to conclude that it
is stalling?

--Gary


Hi,

plane stalls really when i pitch down.
I'm not sure to know exactly how it have been determined but i try to
explain.
A plane stalls in my case if liftcoefficent for a cambered airfoil with
a plan trailing edge flap is equals to zero.
Flaps to calc. liftcoefficient are landing flaps and ailerons.