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Old 06-06-2016, 11:14 AM   #5
NN5I
Carl, nn5i
 
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Join Date: Sep 2011
Location: Tallahassee, FL
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Quote:
Originally Posted by N3LYT View Post
Large radio/TV transmitting tubes are water cooled (heat exchanger). Yes water by it's self cools much better than any mix. It has taken the RR industry a long time to deal with coolant as they cool the engines with just water and they just let the engines run in freezing weather. It slowly dawned on them that running a 3,000HP engine was a little costly so they now mostly use a small diesel gen set and use electric heaters to keep the big one warm and the batteries charged.
Interesting. I had read about just letting them idle so they wouldn't freeze -- but I didn't know they had wised up and found better ways to keep them warm. Glad to hear it.
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