(= (Position (Reference-Point Gimbal-2-Base)
(Reference-Point Planar-Mace))
(* (- (Buslength Bus-Assy))
(Basis.Vec (Reference-Frame Planar-Mace) 1)))
(= (Orientation (Reference-Frame Gimbal-2-Base)
(Reference-Frame Planar-Mace))
(Simple-Rotation 3 180))