Hi! Does anyone have an example of a manipulation of an airplane using physics?
because because i don't want just move the model around using translation and rotation… I want it to fall if a stop the acceleration and etc…
it can be simples i just want to know the right way to do it 
if you don't have and example can you at least tell me the idea of how to do the physics in a good way in games development?
thank you!! 
You really don't need a whole physics engine to do a flight simulator, and I would say it would actually be harder to create the right physics of it because of aerodynamics plying a role, and that is basically fluid physics. I suggest creating the flight logic yourself (obviously including things like if the speed is not enough, then fall down, and such).
Alternatively, you could apply a physics force as a function of the current speed. Such force would be perpendicular to the speed and would amount to the lift force.
To me tt's not that easy :s as applying a force in function of the current speed :(. Seriously.
I don't see an reason not to use a physics engine, especially if you need proper collisions on an uneven terrain or with solid objects.
I also found that a physics engine helps me with aspects like spinning wheels, bouncing at landing, and improves the feeling of accelerating from a still position (if on wheels).
Also, thinkings in terms of "non-physics" seems a whole lot more difficult to me.
I also think that writing an equation system does help.
You may have a look at shingoki aircarrier to get started with airflight.
shingoki took the path of simplified physics i think.