TU7 diesel locomotive

TU7 (ТУ7) - Soviet, later Russian diesel locomotive for gauge 750 mm (2 ft 5 1⁄2 in) – 1,067 mm (3 ft 6 in).

TU7 - TU7A
Type and origin
Power typeDiesel
BuilderKambarka Engineering Works
Build date1971 - today
Specifications
Configuration:
​
 • UICB'B'
Gauge750 mm (2 ft 5 1⁄2 in) to
1,435 mm (4 ft 8 1⁄2 in)
Wheel diameter600 mm (23.62 in)
Minimum curve40 m (131.23 ft)
Length9,400 mm (30 ft 10 1⁄8 in)
Width2,450 mm (8 ft 1⁄2 in)
Height3,550 mm (11 ft 7 3⁄4 in)
Axle load5 t (4.9 long tons; 5.5 short tons) (?)
Loco weight24 t (24 long tons; 26 short tons)
Fuel typeDiesel
Prime moverBernaul 1D12-400
Engine typeV12 diesel
Cylinders12
Transmissionhydraulic
Performance figures
Maximum speed50 km/h
Power output400 hp
Career
Class RUS - ТУ7 / ТУ7А
 Belarus - ТУ7 / ТУ7А
 Bulgaria - TU7E (series 81 БДЖ)
 Slovakia - TU46
 Vietnam - D4H / D4Hr
 Ukraine - ТУ7 / ТУ7А
 Estonia - ТУ7 / ТУ7А
 Latvia - ТУ7 / ТУ7А
 Lithuania - ТУ7 / ТУ7А
 Cuba - TU7E
 Guinea - TU7E

History

The TU7 (ТУ7) was developed in 1971–1972 at the Kambarka Engineering Works to replace the aging locomotive classes TU4 (ТУ4) and TU2 (ТУ2). There were 3,361 locomotives constructed, of which several hundred were exported to the countries of the socialist community and affiliated countries. The TU7 - TU7A (ТУ7 - ТУ7А) was designed to be used on any gauge from 750 mm (2 ft 5 1⁄2 in) to 1,435 mm (4 ft 8 1⁄2 in). In 1986 the locomotive design was updated and designated type TU7A (ТУ7А).

D4H

The D4H 1,000 mm (3 ft 3 3⁄8 in) and 9 locomotives D4Hr for standard gauge 1,435 mm (4 ft 8 1⁄2 in), also known as the TU7 - TU7A (ТУ7 - ТУ7А) diesel locomotive,[1] is a series of diesel locomotives currently used on the Vietnamese railway network. With 77 locomotives D4H 1,000 mm (3 ft 3 3⁄8 in) in service throughout the country as of 2005, it is the most common type of locomotive in use in Vietnam.[1] The series was originally procured from the Soviet Union after the Vietnam War.

Additional specifications
  • Distance between bogies - 4,700 mm (185.04 in)
  • Base of bogies - 1,400 mm (55.12 in)
  • Operating speed - 500 to 1,560 r/min

See also

References
  1. "Vietnam Railways: Rolling Stock". Archived from the original on 2011-01-13. Retrieved 2011-01-20. (in Vietnamese)


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