Synchros
The principles of Synchro are similar to those of an electrical transformer. A shaft of the receiver rotates in unison with the rotation of a shaft of the transmitter.
Using the above characteristics, Synchro is used for transmitting mechanical angle variation of transmitter over a long distance. (See "Function of Synchro") Synchros are classified into two types: torque synchros and control synchros.
Control Synchro detects the angle with receiving mechanical angle variation in the form of output voltage.