[GreenKeys] Western Union

[Jim Haynes]

On Thu, 25 Apr 2019, Peter Gottlieb wrote:

> Interesting, I assume they couldn’t count on line frequency and synchronous motors for speed control.
>
>
Certainly not in an airplane.  And I guess not in other places either.

I found a document where Teletype R&D had been asked about putting in
a sync motor.  On the first attempt they couldn't find a sync motor
small enough to fit into the space that had enough torque to run the
machine.  I don't know if there ever was a sync motor worked out for it.