It seems something like "linear aerodynamics" should be manageable.
Lift = lift_constantangle_of_attackvelocitywing_area, in direction perpendicular to velocity
Drag = drag_constantangle_of_attackvelocitywing_area, acts in direction parallel to velocity.
Lift_constant and drag_constant should be functions of angle of attack, for example if Lift_constant goes to zero at some maximum angle of attack it will represent stalling of the wing.
This is somewhat similar to a magnet whose force depends on velocity of the object, instead of the distance to another object...I guess I need to peek at the magnet code.
Kirk