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North British class C

London & North Eastern classes J36 and J32

Great Britain 1888 200 produced
Mike Priestley's Railway Heritage Blog

Between 1888 and 1901, Matthew Holmes had 168 0-6-0 goods locomotives built for the North British which were designated class C. 138 of these had been built at the NBR's own Cowlairs works, while 15 each came from Neilson & Co. and from Sharp, Stewart & Co. In general they were of a standard design with five foot wheels, inside cylinders and Stephenson valve gear. But the cylinders had a relatively huge diameter of 18 inches.

There had already been another similar class C designed by Drummond and built 32 times in 1876 and 1877. Holmes took these and rebuilt them to the same standard as his own class C between 1898 and 1903. Between 1913 and 1923, all 200 locomotives were fitted with a new boiler with a pressure of 165 instead of 150 psi and a larger cab.

The LNER designated all original Holmes locomotives as J36 and all rebuilt Drummond locomotives as J32. 213 were taken over by British Railways in 1948. The last ones were withdrawn in 1967, being the last steam locomotives in service in Scotland. No. 673 „Maude” was the only one preserved, currently being on static display.

drawing of the original state Locomotive Magazine, February 1944

Technical data

General

Built
1888-1903
Manufacturers
Cowlairs, Neilson & Co., Sharp, Stewart & Co.
Wheel arrangement
0-6-0 (Six-coupled)
Gauge
1,435 mm (Standard gauge)

Dimensions and weights

Length
14.95 m
Service mass
41.3 t
Adhesion mass
41.3 t
Total mass
73.8 t
Axle load
15.6 t
Water capacity
13,639 l
Fuel capacity
5.6 t (coal)

Boiler

Grate area
1.579 m²
Firebox surface
9.731 m²
Tube heating surface
105.934 m²
Evaporative heating surface
115.664 m²
Total heating surface
115.7 m²

Power plant

Driver diameter
1,524 mm
Boiler pressure
10.3 bar
Expansion type
simple expansion
Cylinders
two, 457 x 660 mm

Power

Power source
steam
Estimated power
373 kW (507 PS)
Starting effort
79.6 kN

Calculated values

Factor of adhesion
1 : 5.09
Optimal speed
29 km/h
Power-to-weight ratio
9.0 kW/t
Heating Surface Equivalent
164.3 m²
Cylinder volume/HSE
1 : 1,319.62
Adhesive weight/Total
1 : 1.00
Tractive force/Heating surface
1 : 14.38
Grate area/Heating surface
1 : 73.25
Firebox/Tube surface
1 : 10.89
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