EMD F-unit

As EMD F- series, english EMD F -unit or F -series, a series of diesel locomotives of the U.S. locomotive manufacturer General Motors Electro-Motive Division (EMD ) is called. Although these machines were originally built as freight locomotives, subsequently resulted in even versions for passenger train service. 7,592 machines in this series were produced from November 1939 to November 1960, especially in the EMD plant near La Grange, Illinois. 2,904 copies were built as a leader baseless B units. So was this series, in addition to the E-Series offered at the same time, one of the first large diesel locomotives, was granted a long-term commercial success.

Development

In November 1939, EMD introduced a prototype of a four-axle diesel-electric freight locomotive, the FT series, before. Four of these vehicles, each with two copies of the driver's cab and two führerstand loose units were coupled together into a four-piece unit. Each of these locomotives made ​​1,000 kW, 4,000 kW have been achieved. The maximum speed was 120.7 km / h (75 mph).

Models

The rows FP7 and FP9 were intended for passenger services and therefore equipped with a large steam boiler. In order to get enough space for the steam boiler, the machines were around 1.20 m longer than the other engines of the F- series. The series FL9 was a version of the F9 with hybrid drive for the New York, New Haven and Hartford Railroad. In addition to the conventional diesel drive these machines were able to obtain their driving power from a power rail when driving in New York's tunnel system.

Construction

For all machines of the F- series developed by EMD diesel engines were 16-567 to 16 - 567C for use. The first number refers to the number of cylinders (16 ), the second the cylinder displacement in cubic inches. The earlier models FT and F2 used the 1,350 hp = 1.000 kW motor 16-567. For the F3 and F7 models of advanced engine developed 12 - 567B stood with 1,500 hp / 1,100 kW. In series F9, FP9 and FL9 engine power was the Model 16 - 567C ( 1,750 hp / 1,300 kW) further increased.

In contrast to the E- series of EMD models of the F- series were equipped with only one engine per engine. Therefore, the machines could be equipped with the device built by Martin Blomberg -axle bogies. All four axles were driven whereby the BB wheel arrangement resulted. Only the machines of the FL9 had, due to the additional transformer for the hybrid drive, get a three-axle bogie. Thus, it was a very rare wheel arrangement Bo ' (A1A ) ' the hallmark of these machines. The axles of the F- series was, in addition to the shorter length, the main distinguishing feature of the passenger locomotives of the E series, all of which had six axes.

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