DEVELOPMENT OF CONTROL SATURATION WARNING SYSTEM TO ALERT HELICOPTER PILOT FOR POSSIBLE ROTOR STALL CONDITIONS DURING TURNING MAOEUVRE

摘要

When flying a high g left turn (Clockwise rotating Rotor as seen from top) it has been observed that the cyclic control travel limit to the right side may be too short to allow this turn to be stopped by simply moving the stick. If care is not exercised in the use of the collective, lateral cyclic and longitudinal cyclic, a large area of the rotor disc may be aerodynamically stalled and the rot or will not generate the required rotor aerodynamic moments to recover from the left turn. When cyclic saturation is reached the re is an abrupt loss of available lift to counter the left turn. This phenomenon is called control saturation. Keeping this in mind a control saturation warning system is developed to warn the pilot of an impending safety hazard in such rotor stall conditions during turns so that he can apply appropriate controls to recover.