Patent ID: 6405980
Filing Date: 2002-06-18
Classification: B64C

Abstract:
In a rotor aircraft having a fuselage and a rotor mounted on a rotor head for tilting in fore and aft directions, an improved control system for controlling tilt of the rotor, an improved control system, comprising:a control stick mounted to the fuselage for fore and aft movement; a linkage assembly connected to the control stick and to the rotor head for tilting the rotor head in fore and aft directions in response to movement of the control stick; an adjusting member mounted between the control stick and the linkage assembly, the adjusting member being movable between first and second positions while keeping the control stick stationary to reposition at least portions of the linkage assembly relative to the control stick into gross and fine positions, the fine position of the linkage assembly desensitizing the control stick so that a selected fore and aft movement of the control stick causes less tilting movement of the rotor head than while in the gross position; wherein the control stick is pivotally mounted to the fuselage about a control stick pivot point, and the linkage assembly has a control point that rotates about the control stick pivot point while the control stick pivots between fore and aft positions; and wherein the adjusting member varies a radius between the control point and the control stick pivot point as the adjusting member moves between the first and second positions.