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To: Graybeard58
I always thought that when you convert energy from one form to another that there is a net loss and therefore it would make more sense to run them directly with diesel engines. Is it just not practical for some reason?

The reason is that it is much more cost effective to generate electricity and use electric motors to drive the wheels than to build a transmission and clutch to handle the power.

Diesel locomotives are typically 2000 to 6000 horsepower, but have a limited RPM range. They would need a lot more gears than a car which has a transmission with 3 to six gear ratios. And, the gears would need to be much larger than automotive gears to handle the loads. Transmissions also have internal losses. These are typically low, but even 1% loss of a few thousand horsepower is a lot of heat, which is where the power loss shows up.

48 posted on 11/27/2012 11:02:01 PM PST by CurlyDave
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To: Red Badger

Ping-Diesel


49 posted on 11/27/2012 11:36:59 PM PST by moose07 (The truth will out, one day.)
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