LMS Jubilee Class

LMS Jubilee Class

Preserved No. 45593 Kolhapur

Type and origin Power type Steam Designer William Stanier Builder LMS Crewe Works - (131) LMS Derby Works - (10) North British Loco - (50) Order number LMS Lot nos. 97, 112, 113, 118, 121, 129 Build date 1934–1936 Total produced 191

Specifications Configuration: ​  • Whyte 4-6-0  • UIC 2′C h3 Gauge 4 ft 8 1⁄2 in (1,435 mm) Leading dia. 3 ft 3 1⁄2 in (1.003 m) Driver dia. 6 ft 9 in (2.057 m) Length 64 ft 8 3⁄4 in (19.73 m) Loco weight 79.55 long tons (89.10 short tons; 80.83 t) Tender weight 54.65 long tons (61.21 short tons; 55.53 t) Fuel type Coal Fuel capacity 9.0 long tons (10.1 short tons; 9.1 t) Water cap 3,500 imp gal (16,000 l; 4,200 US gal) Fowler tender - 4,000 imp gal (18,000 l; 4,800 US gal) Stanier tender Firebox:  • Firegrate area 29 1⁄2 or 31 sq ft (2.74 or 2.88 m2) Boiler LMS type 3A Boiler pressure 225 psi (1.55 MPa) Heating surface:  • Tubes and flues 1,372 to 1,470 sq ft (127.5 to 136.6 m2)  • Firebox 162 or 181 sq ft (15.1 or 16.8 m2) Superheater: ​  • Heating area 228 to 331 sq ft (21.2 to 30.8 m2) Cylinders Three Cylinder size 17 in × 26 in (432 mm × 660 mm) Valve gear Walschaerts Valve type Piston valves

Performance figures Tractive effort 26,610 lbf (118.4 kN)

Career Power class LMS: 5XP BR (pre-1955): 6P BR (post-1955) 6P5F (never displayed on cabsides) Numbers LMS: 5552–5742 BR: 45552–45742 Axle load class BR: Route Availability 8 Withdrawn 1952 (1), 1960–1967 Disposition Four preserved, remainder scrapped

For the details of the two rebuilt locomotives, see LMS Rebuilt Jubilee Class

The London Midland and Scottish Railway (LMS) Jubilee Class is a class of steam locomotive designed for main line passenger work. 191 locomotives were built between 1934 and 1936. They were built concurrently with the LMS Stanier Class 5 4-6-0.

The last five locomotives of Henry Fowler's Patriot class on order, 5552 to 5557, were built with William Stanier’s taper boiler and so became the first of the Jubilee class. 113 locomotives were ordered straight from the drawing board. They were initially a disappointment; their moderate degree of superheating often left them short of steam. Changes to the blastpipe and chimney dimensions helped to transform them.

On 29 April 1935 no. 5552, the first of the class, permanently swapped identities with no. 5642 which had been named Silver Jubilee on 19 April 1935 in recognition of the Silver Jubilee of King George V on 6 May of that year. This change gave the name to the rest of the class, see LMS Jubilee Class 5552 Silver Jubilee. Earlier on (from summer 1934), they had been known as the "Red Staniers" (because of the crimson livery), to distinguish them from the "Black Staniers" (the LMS Stanier Black Five class).

They are often associated with the Midland Division, i.e. the lines inherited from the former Midland Railway. This is because until the late 1950s, it was rare for any 7P locomotives to work south of Leeds. Until then, Jubilees were the largest express engine normally found on the lines running out of St Pancras or radiating from Derby. They could nevertheless be found on main lines throughout the former LMS system.

The power classification was 5XP, in common with the earlier Patriot class. In January 1951, the classification was revised to 6P; this was revised again to 6P5F in November 1955, but the latter change was not applied to the locomotives' cabsides, which continued to show 6P. The two rebuilt locomotives (nos. 5735/6) were reclassified 6P in July 1943, being revised to 7P in 1951.