EMD F series
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The EMD F-series , English EMD F-unit or F-series, is a series of diesel locomotives made by the US locomotive builder General Motors Electro-Motive Division (EMD). Although these machines originally a freight train - locomotives were built, emerged as a result, versions for the passenger train service . 7,592 machines of this series were produced from November 1939 to November 1960, mainly in the EMD workshops in La Grange, Illinois . 2,904 units were built as B units without a driver's cab . In addition to the E series , which was also offered at the same time , this series was one of the first large diesel locomotives to achieve long-term commercial success.
development
In November 1939 EMD presented the prototype of a four-axle diesel-electric freight locomotive, the FT series . Four of these vehicles , two with a driver's cab and two without a driver's cab, were coupled together to form a four-part unit. Each of these locomotives had an output of 1,000 kW; a total of 4,000 kW were achieved. The top speed was 120.7 km / h (75 mph).
Models
| variant | from | to | power | A units with a driver's cab |
B units without a driver's cab |
|---|---|---|---|---|---|
| FT | 1939 | 1945 | 1,350 hp (1,000 kW) | 555 | 541 |
| F2 | 1946 | 1946 | 1,350 hp (1,000 kW) | 74 | 30th |
| F3 | 1946 | 1949 | 1,500 hp (1,118 kW) | 1111 | 696 |
| F7 | 1949 | 1953 | 1,500 hp (1,118 kW) | 2366 | 1483 |
| FP7 | 1949 | 1953 | 1,500 hp (1,118 kW) | 378 | |
| F9 | 1954 | 1957 | 1,750 hp (1,305 kW) | 87 | 154 |
| FP9 | 1954 | 1959 | 1,750 hp (1,305 kW) | 79 | |
| FL9 | 1956 | 1960 | 1,750 / 1,800 hp (1,305 / 1,342 kW) | 60 |
The FP7 and FP9 series were intended for passenger traffic and were 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 locomotives of the F-series. The FL9 series was a version of the F9 as a two-power locomotive for the New York, New Haven and Hartford Railroad . In addition to the conventional diesel drive , these machines were able to obtain their traction current from a conductor rail when driving in the New York tunnel system .
construction
The diesel engines 16-567 to 16-567C developed by EMD were used in all machines of the F series . The first number indicates the number of cylinders (16), the second the displacement per cylinder in cubic inches . The earlier versions FT and F2 used the 1350 hp = 1000 kW engine 16-567. The further developed engine 12-567B with 1500 hp / 1100 kW was available for the types F3 and F7. In the F9, FP9 and FL9 series, the engine output could be increased again with the 16-567C (1750 hp / 1300 kW).
In contrast to the E series from EMD, the F series machines were only equipped with one diesel engine per locomotive. That is why they could be equipped with the two-axle bogies designed by Martin Blomberg . All four axles were powered, which resulted in the Bo'Bo ' wheel arrangement. Only the machines of the FL9 series had to have a three-axle bogie at the transition end , due to the additional equipment required for the two-power drive . Thus the very rare Bo '(A1A) wheel arrangement became the trademark of these machines. The number of axles of the F-series was, in addition to the shorter length, the main distinguishing feature compared to the E-series passenger locomotives, which all had six axles.