Wing Walking

in a wind tunnel sufficiently low so that they can study laminar flow over an airfoil, for example. The same type of situation can occur with automatic control devices. For example, suppose that y corresponds to the position of a flap on an airplane wing that is regulated by an automatic control. The desired position is y = 0. In the normal motion of the 83 2.5 Autonomous Equations and Population Dynamics plane the changing aerodynamic forces on the flap will cause it to move…