Re: Georgetown Loop 130 and 140

True - Alco, EMD and GE (for its domestic road locomotives) do usually list the traction horsepower rating.

But GE on most of its industrial locomotive designs tended to list the gross horsepower in advertising and on the builder's plates, and I am suspicious that in many cases these represent the maximum short-time rating of the diesels. Many of the other GE models can use the gross or traction horsepower, it's not real consistent as to which figure it will use. Most of their industrials and the 44 tons listed the gross horsepower, while many railroad designs list the traction horsepower, in some cases GE would stamp both. There is also the 65/80 ton which GE stamped as 470 hp, but advertised them as 550 hp engines, and specified them as 470 for locomotive use and 420 hp traction.

For export sales, the typical standard seems to be gross horsepower but expressed in kilowatts.

The horsepower name game continues as most modern gen-set locomotives are advertised/sold based on their gross not traction horsepower. So a gen-set with three 700 hp engines advertised as 2100 hp is actually substantially less in traction horsepower.

So you have to figure out which horsepower rating you are dealing with. Same thing with weights for export models - short tons, long tons or metric tonnes - all three can be found depending on the source information.