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The reference for locomotives and railcars

Great Eastern classes S46 “Claud Hamilton”, D56 “Belpaire Claud” and H88 “Super Claud”

London & North Eastern classes D14, D15 and D16

Great Britain 1900 121 produced
H88 or LNER D16/3 No. 62527 in BR livery in August 1949 at Cambridge depot Ben Brooksbank CC BY-SA 2.0

The Class S46 “Claud Hamilton” designated 4-4-0 express locomotives of the Great Eastern Railway, which were named after its chairman. Although James Holden was actually responsible for the design, he was out of the country at the time and handed over the actual work to Frederick Vernon Russell.

The 41 S46s built between 1900 and 1903 were all built with oil firing. The oil came as a waste product from the GER gasworks. Other features included the variable blast pipe, a power reverser and a tender with scooping device. Between 1903 and 1911 a total of 70 D56 “Belpaire Claud” were built, which had a Belpaire firebox. The first ten were again built with oil firing, which was later replaced with coal firing in these and all S46s. The last four D56s were already delivered with two different superheaters. 

In 1923, ten H88 “Super Claud” models followed, which had a superheated boiler. They were designed by Alfred John Hill and were taken over directly by the LNER. The predecessors also received the same boiler. The LNER designated the three classes as D14, D15 and D16. As early as 1911, they were replaced in front of the heaviest express trains by the 4-6-0 S69, which in turn was based on the Claud. The services now increasingly took place in front of passenger and freight trains. The locomotives were withdrawn between 1948 and 1960 and scrapped without exception.

Technical data

General

Property S46 Claud Hamilton D56 Belpaire Claud D56 Super Claud
Built 1900-1903 1903-1911 1923
Manufacturers Stratford
Wheel arrangement 4-4-0 (American)
Gauge 1,435 mm (Standard gauge)

Dimensions and weights

Property S46 Claud Hamilton D56 Belpaire Claud D56 Super Claud
Wheelbase 7.16 m
Service mass 51.3 t 52.5 t 55.3 t
Adhesion mass 33.8 t 35 t 36.3 t
Total mass 91.1 t 92.4 t 95.2 t
Rigid wheelbase 2.74 m
Axle load 18.6 t 17.8 t 18.4 t
Water capacity 15,683 l
Fuel capacity 3,252 l (oil) 5.1 t (coal)

Boiler

Property S46 Claud Hamilton D56 Belpaire Claud D56 Super Claud
Grate area 1.979 m² 2.007 m²
Firebox surface 10.591 m² 10.935 m²
Tube heating surface 140.934 m² 147.651 m² 107.517 m²
Evaporative heating surface 151.525 m² 158.586 m² 118.451 m²
Total heating surface 151.5 m² 158.6 m² 139.4 m²
Superheater surface 20.996 m²

Power plant

Property S46 Claud Hamilton D56 Belpaire Claud D56 Super Claud
Driver diameter 2,134 mm
Boiler pressure 12.4 bar
Expansion type simple expansion
Cylinders two, 483 x 660 mm

Power

Property S46 Claud Hamilton D56 Belpaire Claud D56 Super Claud
Power source steam
Estimated power 597 kW (812 PS) 615 kW (836 PS) 746 kW (1,014 PS)
Starting effort 76.0 kN

Calculated values

Property S46 Claud Hamilton D56 Belpaire Claud D56 Super Claud
Factor of adhesion 1 : 4.36 1 : 4.52 1 : 4.68
Optimal speed 48 km/h 50 km/h 60 km/h
Power-to-weight ratio 11.6 kW/t 11.7 kW/t 13.5 kW/t
Heating Surface Equivalent 204.5 m² 213.3 m² 215.1 m²
Cylinder volume/HSE 1 : 1,181.55 1 : 1,132.90 1 : 1,123.11
Adhesive weight/Total 1 : 1.52 1 : 1.50 1 : 1.52
Tractive force/Heating surface 1 : 10.48 1 : 10.02 1 : 11.39
Grate area/Heating surface 1 : 76.57 1 : 79.02 1 : 69.48
Firebox/Tube surface 1 : 13.31 1 : 13.50 1 : 9.83
Total/Superheater 1 : 5.64
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