LNWR 1185 Class

LNWR 1185 Class
No. 289 in photographic grey livery
Type and origin Power type Steam Designer Charles Bowen-Cooke Builder LNWR Crewe Works Serial number 5040–5049, 5247–5256, 5357–5366 Build date 1911–1917 Total produced 30
Specifications Configuration: ​  • Whyte 0-8-2T  • UIC D1 n2t Gauge 4 ft 8 1⁄2 in (1,435 mm) Driver dia. 4 ft 3 in (1.295 m) (4 ft 5½ in with 3 in tyres) Trailing dia. 3 ft 9 in (1.143 m) (with 3 in tyres) Wheelbase 5 ft 9 in + 5 ft 9 in + 5 ft 9 in + 6 ft 3 in = 23 ft 6 in Axle load 13T-0C+17T-5C+15T-5C+14T-0C+13T-0C = 72T-10C Adhesive weight 59 long tons 10 cwt (133,300 lb or 60.5 t) Loco weight 72 long tons 10 cwt (162,400 lb or 73.7 t) Fuel type Coal Fuel capacity 2 long tons 15 cwt (6,200 lb or 2.8 t) Water cap 1,200 imp gal (5,500 l; 1,400 US gal) Firebox:  • Firegrate area 23.6 sq ft (2.19 m2) Boiler Pitch: 8 ft 3 in (2.51 m) Boiler pressure 170 lbf/in2 (1.17 MPa) Heating surface 1,953.25 sq ft (181.463 m2)  • Tubes 276 × 1⅞ in o/s dia. 1806.5 sq.ft.  • Firebox 146.75 sq ft (13.634 m2) Cylinders Two, inside Cylinder size 20 1⁄2 in × 24 in (521 mm × 610 mm) [corrected from 26 in] Valve gear Joy valve gear
Performance figures Tractive effort 27,240 lbf (121.2 kN)
Career Operators London and North Western Railway London, Midland and Scottish Railway British Railways Power class LMS/BR: 6F First run 1911 Withdrawn 1934–1953 Disposition All scrapped

The LNWR 1185 Class was a class of 0-8-2T steam tank locomotives designed by Charles Bowen-Cooke and introduced in 1911. They passed into LMS ownership in 1923 and 8 survived to British Railways ownership in 1948. British Railways numbers were 47875-47896 (with gaps).

Shunting tank engines. 30 engines, designed under the supervision of C J Bowen-Cooke, and built at Crewe during 1911-1917. Intended for duties formerly needing two locomotives. Essentially a tank version of the G class 0-8-0s. When introduced they had the then new style of 12″ letters for the company's initials on the tank sides. They were fitted with saturated "Precursor" class boilers with lagged ends, round-top fireboxes, and sloping coal bunkers. The main wheels were coupled by three overlapping rods and the third pair of wheels were flangeless. Lever actuated Joy reversing gear appeared in-lieu of the normal Ramsbottom screw system. The earlier engines initially had slender tapered Cooke buffers but these were replaced by those of standard Webb pattern: The latter type was fitted from new on later engines. Braking was by steam, but vacuum brakes were provided to operate fitted or passenger stock if required.

During the Depression years many of the class spent time in store for want of work and almost half were scrapped. Ten, however, survived to be taken into nationalised stock at the start of 1948.

No.1090, as BR No.47884, achieved the highest calculated service mileage of 732,425 miles. Others ran 715,830 miles [No.47896], 701,005 miles [No.47877], 692,706 miles [No.47881] and 553,433 miles [No.7885].