NBR Class M 4-4-0

NBR Class M
LNER Class D31

Type and origin Power type Steam Designer Matthew Holmes Build date built 1884-1899 rebuilt 1918-1922

Specifications Configuration 4-4-0 Gauge 4 ft 8 1⁄2 in (1,435 mm) Driver diameter 6 ft 6 in (1.98 m) Loco weight 46.4 long tons (47.1 t) Fuel type coal Boiler pressure 175 psi (1.21 MPa) Cylinders two inside Cylinder size

Performance figures Tractive effort 16,515 lbf (73.46 kN)

Career Power class BR: 2P Disposition All scrapped

The NBR Class M was a class of 4-4-0 steam locomotive of the North British Railway. The class was rebuilt during the tenures of William P. Reid and Walter Chalmers from three earlier classes, the "574", "633", and "729" which had been designed by Matthew Holmes.

The locomotives passed to the London and North Eastern Railway in 1923 but withdrawals began in 1931 and only seven of the class passed to British Railways in 1948.

Numbering

British Railways numbers were 62059, 62060, 62062, 62064, 62065, 62066, 62072.

Preservation

The last D31 was withdrawn in 1952 and none was preserved.

Sources

• Ian Allan ABC of British Railways Locomotives, 1948 edition, part 4, page 18

External links

• LNER Encyclopedia
• Rail UK database