Locomotives of the Great North of Scotland Railway (GNoSR) Cowan D471 & D47/2, D39 & D45

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The LNER used the D47 classification to cover two distinct Great North of Scotland Railway (GNSR) classes. Originally GNSR Class L was to become LNER Class D47. No provision had been made for the obsolete Class K, and three engines still survived at the end of 1924 when revised diagram books were issued. Hence Class K became LNER Class D47/2.
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Info from LNER Encyclopedia​
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Cowan designed the six Class K to handle the extra traffic due to the opening of the Fraserburgh branch. They were eventually built in 1866 by Neilson & Co. ​
The Class K engines were all rebuilt between 1889 and 1891 by Manson. Slightly larger boilers were fitted, and some of the Cowan beading and decoration was removed. The dome was moved forward from the firebox to the boiler barrel, but continued to retain the decorative polished brass cover. Unusually for a Manson rebuild, the Salter spring-balance safety valves were retained on the dome. ​
Roscoe lubricators were fitted to the side of the smokebox. Later, the GNSR added additional lubricators in the form of Furness lubricators mounted on the running plate. Both types were still in use at Grouping (1923).​
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LNER Class D47/2 (GNSR Class K)​
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Three class K engines were withdrawn in 1921 and did not enter LNER ownership. The remaining three were withdrawn in 1925. ​

45 in GNSR green and taking part in the Stockton & Darlington Centenary celebrations 1925 Cowan D47-2 (GNSR Classes K & L) 4-4-0

https://railway-photography.smugmug.com ... /i-f6tG4Mt

Cowan D47/1 & 47/2 (GNSR Classes K & L) 4-4-0 Locomotives - Railway-Photography
railway photographs from the last 100 years
railway-photography.smugmug.com











45 Cowan D47-2 (GNSR Classes K & L) 4-4-0

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Cowan D47/1 & 47/2 (GNSR Classes K & L) 4-4-0 Locomotives - Railway-Photography
railway photographs from the last 100 years
railway-photography.smugmug.com










48A Cowan D47-2 (GNSR Classes K & L) 4-4-0 not sure what the apparatus on the front buffer beam is for


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Cowan D47/1 & 47/2 (GNSR Classes K & L) 4-4-0 Locomotives - Railway-Photography
railway photographs from the last 100 years
railway-photography.smugmug.com











LNER Class D47/1 (GNSR Class L)​
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The building of the Class K engines was followed by a long period of strict economy on the GNSR, and no further locomotives were ordered until October 1873. Delivery was delayed, in-part due to confusion over the number of locomotives authorised and ordered. Eventually six new Class L locomotives were built by Neilson & Co in 1876. These engines had slightly larger boilers and cylinders compared to their Class K predecessors. ​
Pickersgill rebuilt all six Class L engines between 1897 and 1901, using boilers of similar proportions as the originals. In contrast to the Class K engines, the rebuilds replaced the dome-mounted Salter spring-balance safety valves with Ramsbottom safety valves with seat and column casings fitted to the firebox. Generally speaking, the Class L engines kept less of their original Cowan decoration and beading than the Class K engines. ​
The Class L engines had a mixture of Roscoe and Furness lubricators fitted before the rebuilds. The rebuilds standardised on just the Furness lubricators. By Grouping (1923), these had often been replaced by sight feed lubricators. ​
All six Class L engines survived into LNER ownership, although four were already marked for imminent withdrawal. Five were withdrawn in 1924, and the sixth engine (No. 52A) was withdrawn in 1926.


52A Cowan D47-1 (GNSR Classes K & L) 4-4-0


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Cowan D47/1 & 47/2 (GNSR Classes K & L) 4-4-0 Locomotives - Railway-Photography
railway photographs from the last 100 years
railway-photography.smugmug.com










The Great North of Scotland Railway (GNSR) ordered twelve locomotives in 1877 based on Cowan's earlier GNSR Class L (LNER D47/1) locomotives but with larger diameter cylinders (17.5in compared to 17in). The design followed the traditional GNSR outside cylinder 4-4-0 pattern. Nine were fitted with 5ft 7in driving wheels and became GNSR Class M (LNER D45). The remaining three were fitted with 6ft 1in driving wheels and became GNSR Class C (LNER D39). All twelve engines were built by Neilson & Co, and the three D39s were delivered between December 1878 and January 1879. These were the last GNSR engines built to a Cowan design before his resignation in 1883.

1 Cowan D39 (GNSR Class C) 4-4-0


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Cowan D39 (GNSR Class C) 4-4-0 Locomotives - Railway-Photography
railway photographs from the last 100 years
railway-photography.smugmug.com








The Great North of Scotland Railway (GNSR) ordered twelve locomotives in 1877 based on Cowan's earlier GNSR Class L (LNER D47/1) locomotives but with larger diameter cylinders (17.5in compared to 17in). The design followed the traditional GNSR outside cylinder 4-4-0 pattern. Three of the locomotives were fitted with 6ft 1in driving wheels and became GNSR Class C (LNER D39). The remaining nine locomotives were fitted with 5ft 7in driving wheels and became GNSR Class M (LNER D45). The D45s also differed from the earlier D47/1s due to a cab sidesheet that neatly curved into the rear splasher. The D47/1 was fitted with a box splasher. All nine engines were built by Neilson & Co



62 Cowan D45 (GNSR Class M) 4-4-0



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Cowan D45 (GNSR Class M) 4-4-0 Locomotives - Railway-Photography
railway photographs from the last 100 years
railway-photography.smugmug.com




60 Cowan D45 (GNSR Class M) 4-4-0


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Cowan D45 (GNSR Class M) 4-4-0 Locomotives - Railway-Photography
railway photographs from the last 100 years
railway-photography.smugmug.com



6840 Cowan D45 (GNSR Class M) 4-4-0




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Cowan D45 (GNSR Class M) 4-4-0 Locomotives - Railway-Photography
railway photographs from the last 100 years
railway-photography.smugmug.com




Neil