NBR K Class
|NBR K class
LNER Class D26/D32/D33/D34
62477 Glen Dochart on Eastfield Locomotive Depot, Glasgow, September 1957
|Designer||D26, Matthew Holmes
D32/D33/D34, William P. Reid
|Builder||NBR Cowlairs works|
|Gauge||4 ft 8 1⁄2 in (1,435 mm)|
|3 ft 6 in (1.067 m)|
|Driver diameter||D26, 6 ft 6 in (1.981 m)
D32/D33/D34, 6 ft 0 in (1.829 m)
|Locomotive weight||D26, 52 long tons (53 t)
D32/1, 53 long tons (54 t)
D32/2, 53.7 long tons (54.6 t)
D33, 54.05 long tons (54.92 t)
D34, 57.2 long tons (58.1 t)
|Tender weight||D26/D32, 40 long tons (41 t)
D33, 44.6 long tons (45.3 t)
D34, 46.65 long tons (47.40 t)
|Boiler pressure||D26/D32/1/D33, 190 psi (1.3 MPa)
D32/2/D34, 180 psi (1.2 MPa)
|Cylinder size||D26/D32/D33, 19 in × 26 in (480 mm × 660 mm)
D34, 20 in × 26 in (510 mm × 660 mm)
|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)
|Railroad(s)||NBR » LNER » BR|
|Power class||BR: 3P (except D26)|
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/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. Later locomotives had superheaters.
The LNER divided the NBR K class into four sub-classes:
LNER Class D26
Twelve engines ordered in March 1902 and built at Cowlairs railway works in 1903. Three were withdrawn in 1922, leaving nine to enter LNER ownership in 1923. These nine had all been withdrawn by July 1926.
LNER Class D32
Twelve engines ordered in 1905 and built at Cowlairs in 1906–07. The LNER began to fit superheated boilers in 1923 and classified the superheated locomotives D32/2. The non-superheated locomotives were classified D32/1.
LNER Class D33
Twelve engines built at Cowlairs in 1909–10. The LNER fitted superheaters to all the D33s between 1925 and 1936.
LNER Class D34
Ten engines built at Cowlairs in 1913. Twenty-two engines built between 1917 and 1920. All the D34s were built with superheaters.
- D32, five locomotives, 62445-62454 (with gaps)
- D33, nine locomotives, 62455-62466 (with gaps)
- D34, thirty locomotives, 62467-62498 (with gaps)
The D34s were named after Scottish Glens:
Locos shown in brackets were withdrawn before Nationalisation
Withdrawals began in 1946 and all the D34s had been withdrawn by 1961. One, 256 Glen Douglas (BR number 62469) has been preserved by the Scottish Railway Preservation Society. It is now on display at the Riverside Museum in Glasgow.