Angular velocity and acceleration of the aircraft is zero. Aerodynamic forces can be modeled using Euler's equation for dynamic pressure. Control linkages have zero offset at hingeline and are perpendicular to horns at neutral.
Control mechanisms are frictionless, and surfaces are mass-balanced.
The wing, stab, fuse, and control surfaces are thin, flat slabs. No aerodynamic counterbalances are used. The pushrods are significantly longer than the servo and control horns.