Rectilinear Potentiometer

The A-4 Trainer came equipped with 3 similar assemblies for the 3 main flight controls, Aileron, Elevator, and Rudder.

To detect the position, each has a “Rectilinear Potentiometer.” This is a linear sliding potentiometer with 6 electrical connections instead of the usual 3.

Disassembled to make sure wiper was connecting well. Looks good inside, lightly lubricated. Measured resistance between connection pins. With the exception of the “S” connection, which connects to a metal strip which is ridden by the wiper, the connections just connect to a continuous resistive strip. I don't need it for this application, but the rudder for example, could use the CT as the center.

The “S” terminal must be “Slider” which is connected to the Wiper.

The normal connections to use with Arduino DAC would be:

10/19/2019