NBR B class

The NBR B Class (LNER Class J35) is a class of 0-6-0 steam locomotive designed by William Paton Reid for freight work on the North British Railway. They were introduced in 1906 and had inside cylinders and Stephenson valve gear. The first eighteen locomotives had piston valves and the remainder had slide valves.

NBR B Class LNER Class J35
Type and origin Power type Steam Designer William Paton Reid Build date 1906-1913 Total produced 76
Specifications Configuration: ​  • Whyte 0-6-0 Gauge 4 ft 8+1⁄2 in (1,435 mm) Driver dia. 5 ft 0 in (1.524 m) Loco weight 51 long tons 0 cwt (114,200 lb or 51.8 t) Fuel type Coal Boiler pressure 180 lbf/in2 (1.24 MPa) Cylinders Two, inside Cylinder size 17 in × 24 in (432 mm × 610 mm) Valve gear Stephenson
Performance figures Tractive effort 22,080 lbf (98.22 kN)
Career Operators NBR » LNER » BR Withdrawn 1946-1962

Classification

Seventy-six locomotives were built and these passed to the London and North Eastern Railway (LNER) in 1923. The LNER classified them as follows:^[1]

• J35/1 Engines with piston valves
• J35/2 Engines with piston valves and short fireboxes
• J35/3 Engines with slide valves

The entire class was fitted with superheaters between 1923 and 1942 and re-classified from 1937 as follows:

• J35/4 Engines with superheaters and slide valves
• J35/5 Engines with superheaters and piston valves

Numbering

Seventy locomotives of classes J35/4 and J35/5 came into British Railways (BR) ownership at nationalisation in 1948 and were numbered as follows:^[2]

• Class J35/5, 64460-64477
• Class J35/4, 64478-64535