LNWR Prince of Wales Tank Class

LNWR 2665 class “5ft 6in Tank (Superheated)”
Type and origin
Power type	Steam
Designer	Charles Bowen Cooke
Builder	LNWR Crewe Works
Serial number	4950–69, 5080–96, 5347–56
Model	1910–1916
Total produced	47
Specifications
Configuration	4-6-2T
UIC classification	2′C1 n2t
Gauge	4 ft 8 ¹⁄₂ in (1,435 mm)
Leading wheel diameter	3 ft 3 in (0.991 m)
Driver diameter	5 ft 8 ¹⁄₂ in (1.740 m)
Trailing wheel diameter	3 ft 3 in (0.991 m)
Locomotive weight	78 long tons (79 t)
Boiler pressure	175 lbf/in² (1.21 MPa)
Heating surface: – Total	Saturated: 1,475 sq ft (137.0 m²) Superheated: 1,330 sq ft (124 m²)
Cylinders	Two
Cylinder size	Saturated: 18 ¹⁄₂ in × 26 in (0 m × 1 m) Superheated: 20 in × 26 in (508 mm × 660 mm)
Valve gear	Joy
Valve type	Piston valves
Career
Class	5ft 6in Tank (Superheated)
Power class	LMS: 4P
Nicknames	Prince of Wales Tank
Withdrawn	1945–1941
Disposition	All scrapped

The London and North Western Railway (LNWR) Prince of Wales Tank Class was a pacific tank engine version of the Prince of Wales Class 4-6-0 steam locomotive.

Bowen-Cooke's predecessor George Whale had built 50 related Precursor Tank Class 4-4-2 engines. In terms of familial relationships, Prince of Wales Tank was both a superheated and extended version of the Precursor Tank, and a version of the Prince of Wales Class 4-6-0 steam locomotive with side tanks and a bunker which necessitated an extension to the frames and trailing pony truck. They were mostly used on suburban services out of Euston station.

The LNWR built 47 of the superheated tanks between 1910 and 1916 under Charles Bowen-Cooke.

All passed onto LMS ownership on the 1923 grouping. The LMS renumbered them 6950–6996 and gave them the power classification 4P. Withdrawals started in 1935, their replacements being Class 4 2-6-4T designs by Fowler and Stanier. All were gone by 1941.

None was preserved.

Table of locomotives
LNWR No.	Crewe Works No.	Build date	Superheated	LMS No.	Withdrawn
2665	4950	01910-12-01-0000Dec 1910	01913-05-01-0000May 1913	6950	01936-09-01-0000Sep 1936
2666	4951	01910-12-01-0000Dec 1910	01915-02-01-0000Feb 1915	6951	01936-01-01-0000Jan 1936
2667	4952	01911-01-01-0000Jan 1911	from new	6952	01937-07-01-0000Jul 1937
2668	4953	01911-01-01-0000Jan 1911	from new	6953	01936-10-01-0000Oct 1936
2669	4954	01911-02-01-0000Feb 1911	from new	6954	01936-09-01-0000Sep 1936
2670	4955	01911-02-01-0000Feb 1911	from new	6955	01936-09-01-0000Sep 1936
217	4956	01911-02-01-0000Feb 1911	from new	6956	01938-04-01-0000Apr 1938
1183	4957	01911-02-01-0000Feb 1911	from new	6957	01937-12-01-0000Dec 1937
1366	4958	01911-02-01-0000Feb 1911	from new	6958	01936-02-01-0000Feb 1936
1797	4959	01911-02-01-0000Feb 1911	from new	6959	01938-03-01-0000Mar 1938
632	4960	01911-03-01-0000Mar 1911	01913-05-01-0000May 1913	6977	01936-03-01-0000Mar 1936
1186	4961	01911-03-01-0000Mar 1911	01914-03-01-0000Mar 1914	6982	01937-03-01-0000Mar 1937
1416	4962	01911-03-01-0000Mar 1911	01916-08-01-0000Aug 1916	6986	01937-01-01-0000Jan 1937
1533	4963	01911-03-01-0000Mar 1911	01913-06-01-0000Jun 1913	6978	01937-03-01-0000Mar 1937
1638	4964	01911-03-01-0000Mar 1911	01915-04-01-0000Apr 1915	6985	01937-04-01-0000Apr 1937
1688	4965	01911-03-01-0000Mar 1911	01913-06-01-0000Jun 1913	6979	01941-04-01-0000Apr 1941
1692	4966	01911-04-01-0000Apr 1911	01915-01-01-0000Jan 1915	6984	01936-04-01-0000Apr 1936
1710	4967	01911-04-01-0000Apr 1911	01914-07-01-0000Jul 1914	6983	01937-02-01-0000Feb 1937
1728	4968	01911-04-01-0000Apr 1911	01913-07-01-0000Jul 1913	6980	01938-03-01-0000Mar 1938
1734	4969	01911-04-01-0000Apr 1911	01913-11-01-0000Nov 1913	6981	01936-04-01-0000Apr 1936
91	5080	01912-07-01-0000Jul 1912	from new	6960	01939-02-01-0000Feb 1939
375	5081	01912-07-01-0000Jul 1912	from new	6961	01938-02-01-0000Feb 1938
376	5082	01912-07-01-0000Jul 1912	from new	6962	01937-01-01-0000Jan 1937
716	5083	01912-07-01-0000Jul 1912	from new	6963	01936-03-01-0000Mar 1936
915	5084	01912-08-01-0000Aug 1912	from new	6964	01937-07-01-0000Jul 1937
932	5085	01912-08-01-0000Aug 1912	from new	6965	01937-12-01-0000Dec 1937
944	5086	01912-08-01-0000Aug 1912	from new	6966	01937-11-01-0000Nov 1937
962	5087	01912-08-01-0000Aug 1912	from new	6970	01936-04-01-0000Apr 1936
858	5088	01912-08-01-0000Aug 1912	from new	6969	01937-06-01-0000Jun 1937
2004	5089	01912-08-01-0000Aug 1912	from new	6971	01937-04-01-0000Apr 1937
327	5090	01912-09-01-0000Sep 1912	from new	6967	01936-02-01-0000Feb 1936
704	5091	01912-09-01-0000Sep 1912	from new	6968	01936-07-01-0000Jul 1936
841	5092	01912-09-01-0000Sep 1912	from new	6972	01937-04-01-0000Apr 1937
963	5093	01912-09-01-0000Sep 1912	from new	6973	01938-02-01-0000Feb 1938
1006	5094	01912-09-01-0000Sep 1912	from new	6974	01936-09-01-0000Sep 1936
1021	5095	01912-09-01-0000Sep 1912	from new	6975	01937-09-01-0000Sep 1937
1184	5096	01912-10-01-0000Oct 1912	from new	6976	01936-02-01-0000Feb 1936
96	5347	01916-09-01-0000Sep 1916	from new	6987	01936-12-01-0000Dec 1936
316	5348	01916-09-01-0000Sep 1916	from new	6988	01936-12-01-0000Dec 1936
809	5349	01916-09-01-0000Sep 1916	from new	6989	01937-08-01-0000Aug 1937
878	5350	01916-10-01-0000Oct 1916	from new	6990	01936-03-01-0000Mar 1936
2098	5351	01916-10-01-0000Oct 1916	from new	6991	01936-02-01-0000Feb 1936
2273	5352	01916-10-01-0000Oct 1916	from new	6992	01937-01-01-0000Jan 1937
2292	5353	01916-11-01-0000Nov 1916	from new	6993	01939-09-01-0000Sep 1939
2298	5354	01916-11-01-0000Nov 1916	from new	6994	01936-02-01-0000Feb 1936
2384	5355	01916-11-01-0000Nov 1916	from new	6995	01937-04-01-0000Apr 1937
2418	5356	01916-11-01-0000Nov 1916	from new	6996	01937-09-01-0000Sep 1937

References

Baxter, Bertram (1979). Baxter, David, ed. British Locomotive Catalogue 1825–1923, Volume 2B: London and North Western Railway and its constituent companies. Ashbourne, Derbyshire: Moorland Publishing Company. pp. 290–291. ISBN 0-903485-84-2.
Casserley, H.C. & Johnston, Stuart W. (1974) [1966]. Locomotives at the Grouping 3: London, Midland and Scottish Railway. Shepperton, Surrey: Ian Allan. p. 79. ISBN 0-7110-0554-0.

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Francis William Webb (1871–1903)	Alfred the Great Coal Engine Coal Tank Experiment Dreadnought Teutonic Greater Britain John Hick Dock Tank Precursor Precedent Improved Precedent Jubilee Waterloo 4ft 6in Tank 5ft 6in Tank 18in Goods (Cauliflower) 18in Tank A B 1400 Class

George Whale (1903–1909)	Experiment 19in Express Goods Precursor Precursor Tank Renown C D E F G

Charles John Bowen Cooke (1909–1920)	1185 Claughton George V Queen Mary Prince of Wales Prince of Wales Tank C1 G1 MM

H. P. M. Beames (1920–1921)	380 G2 G2A

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Locomotives of the London and North Western Railway LMS locomotives British Railways steam locomotives