Model Railroading > SLG&W Switch engine

What are these things designated as?  SW7?  SW?????  ?

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Ex up sw10. I do believe

Yep EX/UP SW10

SW10 is a UP model designation. They were rebuilt by UP from various early EMD switchers, mostly SW9's and SW1200's. In the rebuilding process, UP added improved cooling capacity; thus the raised radiator area.

Mike

Posted from iPhone

Good info on the history of UP's SW10 rebuild project here.  All were rebuilt from SW7's, SW9's and TR5A's.  

SLG&W  - Salt Lake Garfield & Western
Former Electric road out to the Saltair Amusement Park 'in' the Lake.
Had a Motor (Doodlebug) from Fonda Johnstown & Gloverersville that went on to the California Western.

James R.(Jim) Baker
Whittier, CA

WP282 Wrote:
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> SW10 is a UP model designation. They were rebuilt
> by UP from various early EMD switchers, mostly
> SW9's and SW1200's. In the rebuilding process, UP
> added improved cooling capacity; thus the raised
> radiator area.
>
> Mike
>
> Posted from iPhone

They didn't add cooling capacity. They improved it by eliminating the mechanically driven radiator fan and replacing it with a pair of electrically driven ones.
Much more efficient and reliable.