LNWR Dock Tank

LNWR 317 class 4′ 3″ Saddle Tank Shunter
Locomotive 317, Crewe Works No.3464
Type and origin Power type Steam Builder Crewe Works Serial number 3741, 3946, 3977–3984, 4175–4184 Build date 1896–1901 Total produced 20
Specifications Configuration: ​  • Whyte 0-4-2ST  • UIC B1′ n2t Gauge 4 ft 8+1⁄2 in (1,435 mm) Driver dia. 4 ft 3 in (1.295 m) + 2+1⁄2-inch (64 mm) tyres Trailing dia. 2 ft 6 in (0.762 m) Wheelbase Coupled: 7 ft 3 in (2.21 m) Loco: 15 ft 6 in (4.72 m) Loco weight 34 long tons 17 cwt (78,100 lb or 35.4 t) Fuel type Coal Fuel capacity 1.5 long tons (1.5 t) Water cap. 620 imp gal (2,800 L; 740 US gal) Firebox: ​  • Grate area 15 sq ft (1.4 m2) Boiler pressure 150 lbf/in2 (1.03 MPa) Heating surface 967 sq ft (89.8 m2) Cylinders Two, inside Cylinder size 17 in × 24 in (432 mm × 610 mm)
Career Operators London and North Western Railway London, Midland and Scottish Railway British Railways Power class LMS: 1P, later 0F Number in class 1 January 1923: 20 1 January 1948: 2 Nicknames Bissel tanks Locale London Midland Region Withdrawn 1927–1938, 1953, 1956 Disposition All scrapped

The LNWR 317 class, (also known as Saddle Tank Shunter, Dock Tank or Bissel Tank) consisted of a class of 20 square saddle-tanked steam locomotives built by the London and North Western Railway at their Crewe Works between 1896 and 1901. They had a very short coupled wheelbase, with a trailing Bissel truck to carry weight.

They were built in three batches of 1, 9 and 10; their first running number was chosen at random from the numbers left vacant by locomotives that had been transferred to the duplicate list. This fate was almost immediately suffered by the 317 class – after only one or two months in service.^[1]

All passed to the London, Midland and Scottish Railway in 1923, who initially allocated them the numbers 6400–6419 in the passenger tank sequence. Only five (6402/03/07/14/18) had been renumbered before the numbers were changed to 7850–7869 in 1927, thus moving them into the goods and shunting tanks. The LMS changed their power classification from 1P^[2] to 0F at the same time.

Two, 7862 and 7865, survived to enter British Railways service in 1948; 7865 was withdrawn in November 1953, and 7862 three years later. None were preserved.

• http://www.lnwrs.org.uk/GoodsLocos/Loco08.php Archived 28 August 2008 at the Wayback Machine

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