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A SYNCHRO SYSTEM consists of two or more synchros interconnected electrically.
TORQUE SYNCHRO SYSTEMS are systems that use torque synchros to move light loads, such
as dials and pointers.
CONTROL SYNCHRO SYSTEMS are systems that use control synchros to control servo systems.
The servo system, in conjunction with the control synchro system, is used to move heavy loads such as
gun directors, radar antennas, and missile launchers.
MILITARY STANDARD SYNCHROS are synchros that conform to specifications that are
uniform throughout the Armed Services. They replace the prestandard Navy synchros. A typical example
of a military standard synchro designation code is 18TR6A. This code has the following interpretation:
18—Synchro diameter of 1.71 to 1.80 inches
T—Torque
R—Receiver
6—60-Hz frequency
A—Original design
PRESTANDARD NAVY SYNCHROS are synchros designed to meet Navy, rather than service-
wide, specifications. A typical example of a prestandard Navy synchro designation code is 5DG. This
code has the following interpretation:
5—Synchro diameter of 3 3/8 to 3 5/8 inches, length
1/2 inches, weight 5 lbs.
DG—Differential transmitter
