LNWR Class A

LNWR Class A

No. 50 in photographic grey livery
Type and origin
Power type Steam
Designer F.W. Webb
Builder LNWR at Crewe Works
Build date 1893–1900
Total produced 111
Specifications
Configuration 0-8-0
Gauge 4 ft 8 1⁄2 in (1,435 mm)
Driver dia. 4 ft 8 in (1.42 m)
Wheelbase 17 ft 3 in (5.26 m)
Loco weight 50 long tons 0 cwt (112,000 lb or 50.8 t)
Fuel type Coal
Boiler pressure 175 psi (1.21 MPa)
Heating surface 1,489 sq ft (138.3 m2)
Cylinders Three, compound
High-pressure cylinder (2 outside) 15 by 24 inches (380 mm × 610 mm)
Low-pressure cylinder (1 inside) 30 by 24 inches (760 mm × 610 mm)
Valve gear Stephenson link motion
Career
Operators London and North Western Railway
Disposition 15 rebuilt to Class C 1904–06
62 rebuilt to Class D 1906–09
34 rebuilt to Class C1 1909–12

The London and North Western Railway (LNWR) Class A was a class of 0-8-0 steam locomotives. From 1893 to 1900, Crewe Works built 111 of these engines, which had a three-cylinder compound arrangement, and were designed by Francis Webb. According to the LNWR Society, 110 were built between 1894 and 1900.[1]

Rebuilding

Like the other Webb compounds, they proved problematic, so in 1904 George Whale began rebuilding these to simple expansion engines. Fifteen were converted to Class C between 1904–1906, 62 to Class D between 1906–1909, with the remaining 34 rebuilt by Charles Bowen Cooke to Class C1 between 1909-1912.

Classification

The LNWR letter classification system for 8 coupled engines (A, B, C, etc.) was introduced in 1911.

References

  1. ↑ LNWR Society. "Goods Engines of LNWR - 'A' Class". Lnwrs.org.uk. Retrieved 2012-04-09.

Further reading

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