NBR K Class

NBR K Class LNER Class D26 / D32 / D33 / D34
62477 Glen Dochart on Eastfield Locomotive Depot, Glasgow, September 1957
Type and origin Power type Steam Designer D26, Matthew Holmes D32/D33/D34, William P. Reid Builder NBR Cowlairs works Build date 1903–1920 Total produced 68
Specifications Configuration: ​  • Whyte 4-4-0 Gauge 4 ft 8+1⁄2 in (1,435 mm) standard gauge Leading dia. 3 ft 6 in (1.067 m) Driver dia. D26, 6 ft 6 in (1.981 m) D32/D33/D34, 6 ft 0 in (1.829 m) Length D34, 17.068 m (56.00 ft) D26,17.145 m (56.25 ft) Loco weight D26, 52 long tons (53 t; 58 short tons) D32/1, 53 long tons (54 t; 59 short tons) D32/2, 53.7 long tons (54.6 t) D33, 54.05 long tons (54.92 t; 60.54 short tons) D34, 57.2 long tons (58.1 t; 64.1 short tons) Tender weight D26/D32, 40 long tons (41 t; 45 short tons) D33, 44.6 long tons (45.3 t) D34, 46.65 long tons (47.40 t) Fuel type Coal Boiler pressure D26/D32/1/D33, 190 psi (1.3 MPa) D32/2/D34, 180 psi (1.2 MPa) Cylinders Two inside Cylinder size D26/D32/D33, 19 in × 26 in (483 mm × 660 mm) D34, 20 in × 26 in (508 mm × 660 mm)
Performance figures Tractive effort D26, 19,434 lbf (86.45 kN) D32/1/D33, 21,053 lbf (93.65 kN) D32/2, 19,945 lbf (88.72 kN) D34, 22,100 lbf (98 kN)
Career Operators NBR » LNER » BR Power class BR: 3P (except D26) Nicknames Glen class (D34 only), Intermediates (D32 and D33 only) Disposition One preserved, remainder scrapped

The NBR K Class is a class of 4-4-0 steam locomotive of the North British Railway. The first batch (later LNER Class D26) was designed by Matthew Holmes in 1902 and had 6-foot-6-inch (1.981 m) driving wheels for express passenger work. Three more batches (later LNER Classes D32, D33, and D34) were designed by William P. Reid with 6-foot-0-inch (1.829 m) driving wheels for mixed traffic work. This included perishable goods, such as fish from Mallaig and Aberdeen. They had inside cylinders and Stephenson valve gear. The D34 locomotives, commonly known as Glen Class, were built with superheaters. The LNER later fitted superheaters to all D26, D32, and D33 engines as well. All engines of the K class are sometimes known as Glen Class, although the designation is strictly reserved to the fourth (D34) batch.