The earlier GER Class F48 were built between 1900 and 1903 and had round-top boilers; there were sixty of them. The G58 had Belpaire fireboxes, like those fitted to the F48 No. 1189, and later fitted to the Class D56Claud Hamilton 4-4-0s.[1] A further thirty of the Belpaire boiler type followed to form Class G58.
The class was superheated between 1915 and 1932. From 1921, all the round-top boilers were replaced by the Belpaire type and the majority were of the superheated type.
On the LNER, those retaining round-top fireboxes were classified J16, and those built, or rebuilt, with Belpaire fireboxes were classified J17.[4] The J16 category ceased to exist in 1932.[1]
BR ownership
All the J16s had been rebuilt as J17s by 1932 and 89 J17s passed to British Railways (BR) in 1948.[5] BR numbers were 65500–65589, of which 65500–59 were the rebuilds from F48 (J16).[6] One number (65550) was blank, because locomotive no. 8200 had been destroyed in a German V-2 rocket explosion at Stratford in November 1944.[1][7] The second locomotive was withdrawn in 1953, and the last in 1962.[8]
Aldrich, C. Langley (1969). The Locomotives of the Great Eastern Railway 1862–1962 (7th ed.). Wickford, Essex: C. Langley Aldrich. OCLC30278831.
Baxter, Bertram (2012). Baxter, David; Mitchell, Peter (eds.). British Locomotive Catalogue 1825–1923, Volume 6: Great Eastern Railway, North British Railway, Great North of Scotland Railway, Midland & Great Northern Joint Railway, remaining companies in the LNER group. Southampton: Kestrel Railway Books. ISBN978-1-905505-26-5.
Fry, E. V., ed. (September 1966). Locomotives of the L.N.E.R., Part 5: Tender Engines—Classes J1 to J37. Kenilworth: RCTS. ISBN0-901115-12-6.
Ian Allan ABC of British Railways Locomotives, 1948 edition, part 4, page 41