WLs75

The WLs75 is a small power narrow gauge diesel locomotive built in Poland, at the ZNTK in Poznań. It was used mostly on industrial railways.

WLs75
WLs75-38 in a museal station in Rudy
Type and origin
Power typeDiesel mechanical
BuilderZNTK, Poznań
Build date1965 - 1975
Total produced86
Specifications
Configuration:
​
 • Whyte0-4-0
 • UICB
Gauge750 mm (2 ft 5 1⁄2 in)
785 mm (2 ft 6 29⁄32 in)
900 mm (2 ft 11 7⁄16 in)
Driver dia.670 mm
Minimum curve25 m
Wheelbase1550 mm
Length5110 mm
Width1550 mm
Height2650 mm
Adhesive weight5 t
Loco weight10 t
Fuel capacity140 l
Transmissionmechanical
Performance figures
Maximum speed18.5 km/h[1]
Power output75 HP
Tractive effort2400 kg
Career
Operatorsindustry

History

The locomotive's design was started at the CBKPTK (Central Design Bureau of Railway Stock Industry) in Poznań.[2] The design was finally made in 1961 by the ZNTK Poznań (Railway Stock Repair Works). It was powered by 75 hp diesel engine and had a mechanical transmission, driving two axles by cranks and connecting rods.[2]

From 1965, the locomotive entered series production, with a factory designation WLs75 (WLs stood for Wąskotorowa - narrow-gauge, lokomotywa - locomotive, spalinowa - internal combustion engine, practically diesel engine). Until 1975, 86 were built.[2] They were built for 750 mm gauge and 785 mm gauge.[2] Two locomotives were made for 900 mm gauge, for a park railway in Silesian Park.[3]

The locomotives were only used in Poland. It was hoped, that it would be acquired by Polish State Railways (PKP), but the railways found it too weak and were not interested. As a result, they were manufactured for the industry, mostly sugar works, smelters, steelworks and others. Two were used by the Polish Army.[2] A production was relatively low, because most buyers preferred much cheaper 50 hp 2WLs50 locomotives.[2]

  • WLs75-38
  • WLs75-38

References
  1. Pokropiński (2009), p. 208
  2. Pokropiński (2009), p. 165-167
  3. Jakub Halor. "Kolej parkowa" (in Polish). Retrieved 2016-12-16.
  • Pokropiński, Bogdan 2009. Lokomotywy spalinowe produkcji polskiej [Combustion engine locomotives of Polish manufacture] (in Polish). Warsaw: WKiŁ. ISBN 978-83-206-1731-3.
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