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A question re: EMD's GP28/SD28 locomotives

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[quote]QUOTE: Originally posted by Allen Jenkins One for "printable version". ALCo636 is right, the SD79 thread also addresses some of these issues. History in the perspective is in play. I was taught the criteria Mark has given, the perspective of the day. The GP15, for instance. That locomotive was initially offer as a rebuild option, by the builder, using the frames, engine(upgraded to Series 16V645 specs), trucks, and traction motor cases. The result, was the GP15-1. The GP15-1, offered a roadswitcher platform, a standardized cab layout, and the Brotherhood (union), toilet space, in the nose, and also offered a little privacy, or normalcy, which no SW could provide. That's why the GP15-1 has no dynamic braking, as the rebuild units offered no reason to add this brake shoe saving option. Someone, railroad, or builder came up with the enterprising effort, of using this four axle platform, with a turbocharged Series 8V645 engine, rated 1500hp, new traction motors, and AC traction generator of the day, and the GP15T was born, complete with a sleeping cat on the hood. The Chessie System even ran them as mainline power, albiet to offset the stinging cost. At this time the competion had fielded over one hundred U18B, V8 7FDL 1800hp locomotives, for a couple of lines. [/quote] Thanks for clearing that up. These two were definately not turbo-charged but the low hood looked like it came out of EMD rather than some home-grown rebuild. They were pulling really hard to get a long string of empty racks up to ~10 mph across the diamonds at West Chicago.
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