Rudder Feedback Servo

The rudder current draw information is sent back to the hand held transmitter and the pictured servo responds accordingly.

If you look closely at this picture you see that the servo glued to the stick mechanism had a small spring at attached at the end of the servo arm.

That is a tension spring used to center the stick. The servo can loosen or tighten the spring. As higher current draw numbers are received the servo pulls harder on the spring. With lower number the spring is loosened.