To: SASless
To the best of my knowledge the swash plates on the CH-47 have two each hydraulic actuators that impart both lateral (cyclic) input as well as collective input. Each swashplate has an extension arm that is about a foot or more in length. Attached to this extension arm is an electrical actuator that retracts to provide forward cyclic when the helicopter reaches approximately sixty knots. When dropping below sixty knots the actuator is commanded to extend returning the respective swashplates to the commanded collective setting.
The control geometry is such the when applying lateral cyclic the swashplate pivots on the extension attach bearing for the electrical actuator. When forward cyclic is imparted by the electrical actuator the swashplate pivots on the bearings on the hydraulic control actuators.
An added side note: The CH-47 is a cargo and troop carrier and at that time (below sixty knots) the rotor systems are operating at high collective settings and at high power settings. When the rotorheads are returned for overhaul many of the high value components are scrapped due to cracking from high stress levels.
This is especially true for the rear rotor.
