HELICOPTER MAIN ROTOR WOBBLE PLATE Russian patent published in 1997 - IPC

FIELD: aeronautical engineering. SUBSTANCE: wobble plate includes revolving ring with blade turning rods which is connected with drive shaft running from reduction gear by means of torque links and non-revolving ring with lateral and longitudinal control rods articulated to it; non-revolving ring is connected with revolving ring by means of bearing; wobble plate includes also main rotor collective pitch control rod and frame connected with non-revolving ring by means of two spherical bearings. Wobble plate is additionally provided with double-arm lever articulated on housing of reduction gear; one arm of lever is articulated with main rotor collective pitch control rod and other arm is connected with frame by means of two spherical bearings whose centers lie in axis passing through center of shaft of main rotor. Axis is orthogonal to other axis passing through centers of bearings connecting the frame with non- revolving ring and is parallel to axis of turn of lever in hinge. Longitudinal and lateral control rods connected to non-revolving ring are located on different sides from collective pitch control rod. EFFECT: enhanced reliability. 2 dwg