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Great Northern (UK) No. 264 to 269
later Ivatt class B6
Great Britain | 1866 | 6 produced
No. 266 built by Fowler
No. 266 built by Fowler
Locomotive Magazine, March 1899
No. 268 built by the Yorkshire Engine Co.
No. 268 built by the Yorkshire Engine Co.
Locomotive Magazine, March 1899

The last locomotives that Sturrock designed for the GNR were six 2-4-0 express locomotives and a driver diameter of seven feet. These were built half each by Fowler and the Yorkshire Engine Co. The steel driving wheels were an innovation. Since the coupling rods often broke, Stirling converted the locomotives to 2-2-2 wheel arrangement from 1873 onwards. In this form they were more successful and were only retired between 1898 and 1902.

General
Built1866-1867
ManufacturerJohn Fowler & Co., Yorkshire Engine Co.
Axle config2-4-0 (Porter) 
Gauge4 ft 8 1/2 in (Standard gauge)
Dimensions and Weights
Wheelbase18 ft 1 in
Fixed wheelbase18 ft 1 in
Water capacity3,002 us gal
Fuel capacity4,480 lbs (coal)
Power
Power sourcesteam
Estimated power375 hp (280 kW)
Optimal speed23 mph
Starting effort10,528 lbf
Power Plant
Driver diameter84 in
Boiler pressure150 psi
Expansion typesimple
Cylinderstwo, 17 x 24 in
Boiler
Grate area19.7 sq ft
Firebox area121 sq ft
Tube heating area907 sq ft
Evaporative heating area1,028 sq ft
Total heating area1,028 sq ft
Calculated Values
steam locomotive
express
Archibald Sturrock
last changed: 03/2023
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