JNR Class EF57

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Class EF57
EF57-7.JPG
Preserved EF57 7, October 2008
Specifications
Power type Electric
Builder Hitachi, Kawasaki
Build date 1939–1943
AAR wheel arr. 2-C+C-2
UIC classification (2'Co)(Co'2)
Gauge 1,067 mm (3 ft 6 in)
Driver diameter 1,250 mm (4 ft 1 in)
Length 19,920 mm (65 ft 4 in)
Width 2,810 mm (9 ft 3 in)
Height 4,091 mm (13 ft 5 in)
Locomotive weight 110.82 t
Electric system(s) 1,500 V DC
Traction motors DC
Maximum speed 95 km/h (59 mph)
Power output 1.56 MW (2,090 hp)
Tractive effort 9,500 kgf (93,160 N; 20,940 lbf)
Career
Operator(s) JNR
Number in class 172
Disposition One preserved, remainder scrapped

The Class EF57 (EF57形?) of 2-C+C-2 wheel arrangement DC electric locomotives was a development of the previous JNR Class EF56. The 15 EF57s were built between 1939 and 1943 by Hitachi and Kawasaki.

Introduced on Tōkaidō Line passenger services, they were seen at the head of expresses such as the Tsubame, complete with train headboard mounted precariously on the front of the cab decks. With the introduction of the newer semi-streamlined EF58s on Tōkaidō Line services, the EF57s were transferred to the Tōhoku Main Line. At the same time, their steam-heating boilers were removed and replaced by electric-heating generators.

The class remained in use on long-distance express trains on the Tōhoku Main Line until the 1970s.

Preserved examples[edit]

Only one member of the class is preserved: EF57 7 in a park in Utsunomiya, Tochigi Prefecture.

See also[edit]

References[edit]

  • Inoue, Kōichi (1999). 国鉄機関車事典 (JNR Locomotive Guide) (in Japanese). Japan: Man to Man Books. pp. 96–97. ISBN 4-381-10338-6.