Electro Motive SD70ACe

The SD70ACe is the latest and greatest of Electro Motive’s SD70 family of North American freight locomotives.  It is equipped with AC traction motors and one of the latest generation of EMD 710 series prime movers, the EPA Tier 2 emission certified 16-710G3C-T2 turbocharged engine (16 cylinder, 710 cubic inches or 11.6 litres displacement per cylinder, Tier 2) rated at 4,300 horsepower (3,210 kW).  The more angular nose and cab make the SD70ACe look quite handsome.

Canadian Pacific Train 401 lead by BNSF SD70ACe in British Columbia

UP 4141 leading the George Bush (Senior) Express out of Dallas, TX

Under ideal conditions (i.e. from manufacture published specifications), the SD70ACe is able to provide a maximum starting tractive effort of 191,000 lbf (850 kN), 157,000 lbf (700 kN) of maximum continuous tractive effort, and 106,000 lbf (470 kN) of dynamic braking effort.  It has an electronic bell instead of a physical one.  The SD70ACe is the direct domestic competitor of the Evolution Series ES44AC from GE Transportation.

One of the many Union Pacific heritage units (All of them SD70ACe)

Four Class 1 railroads own and operate the SD70ACe, the BNSF Railway, CSX Transportation, the Kansas City Southern Railway, and the Union Pacific Railroad.


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