LNWR Improved Precedent Class

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LNWR Improved Precedent Class
No. 1194 Miranda
Type and origin Power type Steam Designer F. W. Webb Builder Crewe Works Build date 1887–1901 Total produced 158
Specifications Configuration: ​  • Whyte 2-4-0  • UIC 1B n2 Gauge 4 ft 8+1⁄2 in (1,435 mm) standard gauge Leading dia. 3 ft 6 in (1,067 mm) + 3-inch (76 mm) tyres Driver dia. 6 ft 9 in (2,057 mm) Wheelbase Coupled: 8 ft 3 in (2.51 m) Loco: 15 ft 8 in (4.78 m) Loco weight 35.60 long tons (36.17 t; 39.87 short tons) Fuel type Coal Water cap. 1,800 imp gal (8,200 L; 2,200 US gal), later 2,000 imp gal (9,100 L; 2,400 US gal) Boiler pressure 150 lbf/in2 (1.03 MPa) Heating surface 1,063.7 sq ft (98.82 m2) Cylinders Two, inside Cylinder size 17 in × 24 in (432 mm × 610 mm) Valve gear Allan
Performance figures Tractive effort 10,918 lbf (48.6 kN)
Career Operators London and North Western Railway → London, Midland and Scottish Railway Power class LMS: 1P Number in class 1 January 1923: 76 Nicknames Jumbos, large Jumbos Withdrawn 1905–1933 Disposition One preserved, remainder scrapped

The London and North Western Railway (LNWR) Improved Precedent Class or Renewed Precedent Class is a class of 2-4-0 steam locomotives originally designed for express passenger work. They later gained the nickname of Jumbos.