LMS Patriot class

LMS Patriot Class

45501 St. Dunstans at Stafford, 1954

Type and origin Power type Steam Designer Sir Henry Fowler Builder LMS, Crewe and Derby works Build date 1930–1934 Total produced 52

Specifications Configuration 4-6-0 UIC class 2′C h3 Gauge 4 ft 8 1⁄2 in (1,435 mm) standard gauge Leading dia. 3 ft 3 in (0.991 m) Driver dia. 6 ft 9 in (2.06 m) Length 62 ft 8 3⁄4 in (19.120 m) Loco weight 80.75 long tons (82.05 t; 90.44 short tons) Tender weight 42.70 long tons (43.39 t; 47.82 short tons) Total weight 123.45 long tons (125.43 t; 138.26 short tons) Fuel type Coal Fuel capacity 5.5 long tons (5.6 t; 6.2 short tons) Water cap 3,500 imp gal (16,000 l; 4,200 US gal) Firebox:  • Firegrate area 30 1⁄2 sq ft (2.83 m2) Boiler G9½S Boiler pressure 200 psi (1.4 MPa) Heating surface:  • Tubes and flues 1,552 sq ft (144.2 m2)  • Firebox 183 sq ft (17.0 m2) Superheater: ​  • Heating area 365 sq ft (33.9 m2) Cylinders 3 Cylinder size 18 in × 26 in (457 mm × 660 mm) Valve gear Walschaerts Valve type Piston valves Train brakes Vacuum

Performance figures Tractive effort 26,520 lbf (118.0 kN)

Career Operators London, Midland and Scottish Railway → British Railways Power class 1930–51: 5XP 1951–65: 6P5F Numbers LMS (1934): 5500–5551 BR: 45500–45551 Withdrawn 1960–1965 Disposition Original 52 withdrawn and scrapped; New-build project under construction

Rebuilt Patriot Class

45528 R.E.M.E. in November 1962

Type and origin Only differences from above are shown Power type Steam Rebuild date 1946–1949 Number rebuilt 18

Specifications Loco weight 82.00 long tons (83.32 t; 91.84 short tons) Tender weight 54.65 long tons (55.53 t; 61.21 short tons) Total weight 136.65 long tons (138.84 t; 153.05 short tons) Fuel capacity 9 long tons (9.1 t; 10 short tons) Water cap 4,000 imp gal (18,000 l; 4,800 US gal) Firebox:  • Firegrate area 31 1⁄4 sq ft (2.90 m2) Boiler 2A Boiler pressure 250 lbf/in2 (1.72 MPa) Heating surface:  • Tubes and flues 1,667 sq ft (154.9 m2)  • Firebox 195 sq ft (18.1 m2) Superheater: ​  • Heating area 348–367 sq ft (32.3–34.1 m2) Cylinder size 17 in × 26 in (432 mm × 660 mm)

Performance figures Tractive effort 29,570 lbf (131.53 kN)

Career Power class 6P 7P from 1951 Axle load class BR: Route Availability 9

The Patriot Class was a class of 52 express passenger steam locomotives built for the London Midland and Scottish Railway. The first locomotive of the class was built in 1930 and the last in 1934. All of the Patriot class locomotives were withdrawn from service by 1965. The class was based on the chassis of the Royal Scot combined with the boiler from Large Claughtons earning them the nickname Baby Scots.

The first two were rebuilt in 1930 from the 1912-built LNWR Large Claughton Class, retaining the original driving wheels with their large bosses, the "double radial" bogie truck and some other parts. Of the subsequent 50 locomotives of the class 40 were nominal rebuilds of Claughtons, being in fact new builds classified as rebuilt engines so that they could be charged to revenue accounts, rather than capital. The last ten were classified as new builds.

The two former Claughtons retained their original numbers until 1934, when they were renumbered 5500–1. The 40 built as replacements took the numbers of the Claughtons that they replaced; these were renumbered 5502–41 in 1934. The remainder of the class were allocated nos. 6030–9, but were numbered 5542–51 from new. BR added 40000 to their numbers to make them 45500–51. The numbering of the similar LMS Jubilee Class continued on from where the Patriots left off. This was because 5552–5556 were ordered as Patriots (to be numbered 6040–4) but built with taper boilers as Jubilees on the orders of Sir William Stanier.

Naming of the class was somewhat erratic. Some retained old Claughton names, whilst others continued the military associations of the names Patriot and St Dunstans, and 13 carried names of holiday resorts served by the LMS. Seven remained unnamed, although they had been allocated names in 1943.

Between 1946 and 1948 eighteen were rebuilt with Stanier 2A boiler, cab and tender, though again these were paper rebuilds. The rebuilt engines were (4)5512/14/21–23/25–32/34–36/45. These were originally built without smoke deflectors but starting in 1948 were fitted with LMS Royal Scot Class pattern deflectors. The two original members of the class, and the first ten of the nominal rebuilds, were not rebuilt due to their non-standard parts.

All were withdrawn between 1960 and 1965. None have survived to preservation.