Hello,
Student work on a drone simulator:
Here is feed back information (in the wiki)
http://wiki.raydium.org/wiki/LpIer2007
There are information about plane model in pages.
I'll can send you the code if you are interested.
To simplify:
You need propulse, rocket like motor, directed in the direction of the plane.
The up force if proportionnal to this speed, and affected by yaw, pitch and roll of the plane.
Other command add torque to Y and Z axis of the plane.
If you want something more precise i can ask to a good "aeromodeler" en september.
Have a nice day.
Ouille