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The reference for locomotives and railcars

Great North of Scotland classes V and F

London & North Eastern class D40

Great Britain 1899 21 produced
Class F No. 54 “Southesk” flickr/Historical Railway Images

The class V of the Great North of Scotland was the direct successor of the class T, one of the changes being the larger side-window cab. It was a 4-4-0 express locomotive with drivers of 6 ft 1 in designed by locomotive superintendent William Pickersgill. Ten were built by Neilson, Reid & Co., but decreased traffic volumes and financial problems of the GNSR led to the last five being delivered to the South Eastern & Chatham Railway instead, becoming class G. Eight more were built by the GNSR's own Inverurie works between 1909 and 1915.

In 1920, T.E. Heywood introduced a superheated variant that was called class F. Six were produced by North British in the same year and two more followed from Inverurie in 1921, bringing the total number to 21. All locomotives of classes V and F were taken over by the LNER in 1923 and designated class D40. The first one was withdrawn in 1947 and 18 came to British Railways. The last one to be withdrawn was “Gordon Highlander” in 1958. It is the only one that was preserved and can be found in Museum of Scottish Railways.

Class F No. 62278 “Hatton Castle” at Kittybrewster flickr/stratfordman72

Technical data

General

Property V F
Built 1899, 1909-1915 1920-1921
Manufacturers Neilson, Reid & Co., Inverurie North British, Inverurie
Wheel arrangement 4-4-0 (American)
Gauge 1,435 mm (Standard gauge)

Dimensions and weights

Property V F
Wheelbase 6.64 m
Total wheelbase 13.18 m
Service mass 45.6 t 47.7 t
Adhesion mass 32.4 t 33.7 t
Total mass 83.3 t 85.7 t
Rigid wheelbase 2.67 m
Axle load 16.2 t 16.8 t
Water capacity 16,364 l
Fuel capacity 5.6 t (coal)

Boiler

Property V F
Grate area 1.691 m²
Firebox surface 10.545 m² 9.848 m²
Tube heating surface 101.59 m² 70.049 m²
Evaporative heating surface 112.134 m² 79.897 m²
Total heating surface 112.1 m² 92.9 m²
Superheater surface 13.006 m²

Power plant

Property V F
Driver diameter 1,854 mm
Boiler pressure 11.4 bar
Expansion type simple expansion
Cylinders two, 457 x 660 mm

Power

Property V F
Power source steam
Estimated power 485 kW (659 PS) 559 kW (760 PS)
Starting effort 72.0 kN

Calculated values

Property V F
Factor of adhesion 1 : 4.42 1 : 4.60
Optimal speed 42 km/h 48 km/h
Power-to-weight ratio 10.6 kW/t 11.7 kW/t
Heating Surface Equivalent 164.9 m² 155.1 m²
Cylinder volume/HSE 1 : 1,315.30 1 : 1,397.62
Adhesive weight/Total 1 : 1.41
Tractive force/Heating surface 1 : 13.41 1 : 16.18
Grate area/Heating surface 1 : 66.31 1 : 54.94
Firebox/Tube surface 1 : 9.63 1 : 7.11
Total/Superheater 1 : 6.14
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