Ordnance Pamphlet 1303
The purpose or this publication is to provide to all Naval activities necessary information and operational characteristics of Navy synchros. G. E. would call it a SELSYN; to Kollsman its a TELETORQUE; the Bendix version is AUTOSYN; but in the Navy its a SYNCHRO. Since this booklet is directly concerned with The Navy Synchro, it will be called by the Navy name. The same general principles apply to all machines of this type regardless of what they're called.
The advantage of a Synchro system over any kind of a mechanical arrangement is that the two
shafts can be a long distance apart. The only connection needed between them is a few electrical
wires, and only a small amount of electrical power is required to operate the system. This makes it
possible to do many things that would be impossible or impractical with a purely mechanical system.
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