RENFE class 251 locomotive (251 021), with a freight train. Villamanin (León).October 2003.
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The class 251, made under license Mitsubishi, at the moment is only used for the freight transport, essentially, metallurgical freight.
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With 3 Mitsubishi engines and 4.650 Kw power, a weight of 138 Tm, it was the most powerful locomotive acquired by RENFE, in the years 1982 to 1984. 

Photo by Alfonso Alvarez (aalt5@yahoo.es)