AC locomotives staying cool

Dominic MazochOGR Forum Member

The SP with the SD45 had trouble keeping its cooling water and prime movers cool on routes with many tunnels. EMD came up with a "special cooling package" for the SD45-2, the "tunnel motor", for rapid cool downs between tunnels.

For many years, diesel locomotives ahve been rated at about 44-4500 hp at the rail. Yet they do not seem to have the issues with heat like the SD45's. Why is it?

3/31/1911:49 PM

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SPSFOGR Forum Member

I'm interested to hear about this also. I know in the Hot Rod world ~ Aluminum radiators were the answer.

4/2/1911:03 PM

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