Enlarging the vertical stabilizer cured this last problem and hydraulic boosters were fitted for the control system.
2.
Phase two is the intermediate powered control system with low-powered hydraulic boosters transferring commands to the third phase.
3.
The aileron control system, of irreversible servo-control type, is composed of a hydraulic booster, an artificial-feel device, a feel trim actuator and a rigid push-rod transmission mechanism.