NBR K Class

NBR K Class LNER Class D26/D32/D33/D34
Power type	Steam
Designer	D26, Matthew Holmes D32/D33/D34, William P. Reid
Builder	NBR Cowlairs works
Build date	1903-1920
Total produced	68
Configuration	4-4-0
Gauge	4 ft 8 1⁄2 in (1,435 mm)
Leading wheel diameter	3 ft 6 in (1.07 m)
Driver diameter	D26, 6 ft 6 in (1.98 m) D32/D33/D34, 6 ft (1.8 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)
Fuel type	coal
Boiler pressure	D26/D32/1/D33, 190 psi (1,300 kPa) D32/2/D34, 180 psi (1,200 kPa)
Cylinders	two inside
Cylinder size	D26/D32/D33, 19 × 26 in (480 × 660 mm) D34, 20 × 26 in (510 × 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)
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' 6" driving wheels for express passenger work. Three more batches (later LNER Classes D32/D33/D34) were designed by William P. Reid with 6' 0" 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.

Sub-classes

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 Three were withdrawn in 1922, leaving nine to enter LNER ownership in 1923. These nine had all been withdrawn by July 1926.^[1]

LNER Class D32

Twelve engines ordered in 1905 and built at Cowlairs in 1906-7. The LNER began to fit superheated boilers in 1923 and classified the superheated locomotives D32/2. The non-superheated locomotives were classified D32/1.^[2]

LNER Class D33

Twelve engines built at Cowlairs in 1909-10. The LNER fitted superheaters to all the D33s between 1925 and 1936.^[3]

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.^[4]

Post-NBR

The locomotives passed to the London and North Eastern Railway (LNER) in 1923 and, some of them, to British Railways (BR) in 1948. BR numbers ^[5] were:

• D32, five locomotives, 62445-62454 (with gaps)
• D33, nine locomotives, 62455-62466 (with gaps)
• D34, thirty locomotives, 62467-62498 (with gaps)

Names

The D34s were named after Scottish Glens:

62467 Glenfinnan 62468 Glen Orchy 62469 Glen Douglas 62470 Glen Roy 62471 Glen Falloch 62472 Glen Nevis 62473 Glen Spean 62474 Glen Croe 62475 Glen Beasdale 62476 Glen Sloy

62477 Glen Dochart 62478 Glen Quoich 62479 Glen Sheil 62480 Glen Fruin 62481 Glen Ogle 62482 Glen Mamie 62483 Glen Garry 62484 Glen Lyon 62485 Glen Murran 62487 Glen Arklet

62488 Glen Aladale 62489 Glen Dessary 62490 Glen Fintaig 62492 Glen Garvin 62493 Glen Gloy 62494 Glen Gour 62495 Glen Luss 62496 Glen Loy 62497 Glen Mallie 62498 Glen Moidart

Preservation

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.

References

1. ^ http://www.lner.info/locos/D/d26.shtml
2. ^ http://www.lner.info/locos/D/d32.shtml
3. ^ http://www.lner.info/locos/D/d33.shtml
4. ^ http://www.lner.info/locos/D/d34.shtml
5. ^ Ian Allan ABC of British Railways Locomotives, 1948 edition, part 4, page 20

External links

• Photos of Glen Douglas
• LNER database Class D34
• Rail UK database Class D34

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