Oops I forgot to update this blog didn't I. Well, here's a little post about one of the newest members of the EMD family featuring the vastly successful 710 family of engines. Oh and by the way, if you don't know this already, traditionally EMD has named its engines by cylinder displacement (this doesn't apply to the metric H-engine), therefore 710 engines have 710 cubic inch displacement cylinders (yup, it's big enough for my head to fit into).
So far, Canadian Pacific is the only user of this little EMD (well, really Caterpillar now, but what the hell). The GP20C-Eco isn't built as an entirely new locomotive in the traditional sense. They are what's called re-manufactured locos. The buyer sends older generation GP locomotives to Caterpillar, depending on the specific model, certain parts are retained, and the rest are built from scratch. In CP's case, the GP20s used GP9 "cores", the trucks were rebuilt and reused, the rest completely new. With the 8 cylinder 2 150 horsepower 710 engine, this new GP20 also came with electronic brake valves, microprocessor control systems, and a new, larger, and more comfortable cab.
So, GP20C-Eco, quite a complicated name. To be honest, I still haven't quite figured out what the C stands for, but the rest is pretty obvious. GP for general purpose, i.e., 4 axle unit, 20 for 2 000 tractive horsepower, Eco for lower emissions, EPA Tier 0 in this case.
|A repowered GP9 demonstrator with her 8 cyl. 710 engine drawn on the side|
|The finished product looks quite different from the demonstrator indeed|