ntrol system input limitingUS5316240 *Aug 12, 1992May 31, 1994Aerospatiale Societe Nationale IndustrielleMethod and device for filtering the vibratory excitations transmitted between two parts especially between the rotor and the fuselage of a helicopterUS5738300 *Jan 11, 1995Apr 14, 1998Durand; BernardHelicopter autopilot providing airspeed controlUS5799901 *Apr 29, 1997Sep 1, 1998Mcdonnell Dougl