why my plane stalls

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.

Grandss wrote:
Gary Drescher a =E9crit :
"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 sta=
lls
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.

Go to your local aero club or flying school.
Get into a REAL aeroplane with an instructor and find out what happens
when you pitch the nose down.
And don't use terms that you don't understand....

"Grandss" grandss@nospam wrote in message ...
--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.


At a low enough angle of atack (angle between the wing and the air flow)
lift will go to zero - is this what's happening?

At a high angle of atack (pitch up) when a wing "stalls" the lift is reduced
but does not generally go to zero while drag increases a lot.

--
Geoff
the sea hawk at wow way d0t com
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