EMD E-unit

As an EMD E - series, english EMD E -unit or E -series, a series of diesel locomotives for passenger trains of the U.S. locomotive manufacturer General Motors Electro-Motive Division (EMD ) is called. 1,314 locomotives of this series were produced from May 1937 to December 1963 in the EMD plant near La Grange, Illinois, of which 210 copies as a leader baseless B units. Thus, this series was one of the first large diesel locomotives, was granted a long-term commercial success.

The term E- series is originally derived from the used 1800: from (English eighteen hundred ) hp = 1.300 kW diesel engines. The top speed of these locomotives was betw 130 and 160 km / h depending on gear ratio.

Models

Due to the war the U.S. entry in World War II and the associated restriction of locomotive design on freight locomotives, relatively few copies were produced of the first models of the E-series. Only with the E6 and the following series appreciable quantities were achieved. However, the E- series never reached the numbers provided to parallel freight locomotives of the F- series.

Construction

In order to achieve an output of 1,800 hp per locomotive with the diesel engines available at that time, two machine systems had to be installed. The earlier models EA to E2 used the 900 hp ( 700 kW) Winton 201A engine. For the models E3 to E9 developed by EMD 12-567 engine was available. The first number refers to the number of cylinders (12 ), the second the cylinder displacement in cubic inches. The motors used in the models E3 to E7 12 - 567A contributed 1,000 hp ( 750 kW). In the E8 increased to 1,125 hp EMD 567B was used, while the aggregate 567C E9 already made ​​1,200 hp.

Due to the use of two machines of the installation equipment of two triaxial bogies was necessary. But only two driven axles per bogie were needed for the transmission of force between wheel and rail. For this reason, the vehicles in the relatively rare wheel arrangement (A1A ) ( A1A) were performed.

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