LMS Fowler Class 4F

LMS Fowler Class 4F
44444 at Stockport, 1950
Type and origin Power type Steam Designer Henry Fowler Builder LMS Derby Works (185) LMS Crewe Works (165) LMS St. Rollox Works (60) LMS Horwich Works (10) North British Locomotive Co. (80) Kerr, Stuart & Co. (50) Andrew Barclay Sons & Co. (25) Build date 1924–1941 Total produced 575
Specifications Configuration: ​  • Whyte 0-6-0  • UIC C h2 Gauge 4 ft 8+1⁄2 in (1,435 mm) standard gauge Driver dia. 5 ft 3 in (1.600 m) Length 52 ft 0+1⁄8 in (15.853 m) Loco weight 48.75 long tons (49.53 t; 54.60 short tons) Tender weight 41.20 long tons (41.86 t; 46.14 short tons) Fuel type Coal Fuel capacity 4 long tons (4.1 t; 4.5 short tons) Water cap. 3,500 imp gal (16,000 L; 4,200 US gal) Firebox: ​  • Grate area 21 sq ft (2.0 m2) Boiler LMS type G7S Boiler pressure 175 lbf/in2 (1.21 MPa) Heating surface: ​  • Firebox 124 sq ft (11.5 m2)  • Tubes and flues 1,034 sq ft (96.1 m2) Superheater: ​  • Heating area 252 sq ft (23.4 m2) later 246 sq ft (22.9 m2) Cylinders Two, inside Cylinder size 20 in × 26 in (508 mm × 660 mm) Valve gear Stephenson Valve type piston valves Loco brake Vacuum Train brakes Vacuum
Performance figures Tractive effort 24,555 lbf (109.23 kN)
Career Operators London, Midland and Scottish Railway British Railways Power class 4F Numbers LMS: 4027–4606 BR: 44027–44606 Axle load class BR: Route Availability 5 Locale London Midland Region Withdrawn 1959–1966 Disposition 3 preserved, remainder scrapped

The London, Midland and Scottish Railway (LMS) Fowler Class 4F is a class of 0-6-0 steam locomotive designed for medium freight work. They represent the ultimate development of Midland Railway's six coupled tender engines. Many trainspotters knew them as "Duck Sixes", a nickname derived from their wheel arrangement.^[1]