NER Class W1

NER Class W1
LNER Class A6

Type and origin
Power type	Steam
Build date	1914-1917 (rebuild)
Total produced	10

Specifications
Configuration	4-6-2T
Gauge	4' 8½"
Leading dia	3' 1¼"
Driver diameter	5' 1¼"
Length	43' 11"
Loco weight	78 long tons without superheater 79 long tons with superheater
Fuel type	coal
Fuel capacity	4 long tons
Water cap	1,893 imperial gallons
Firebox: • Firegrate area	23 sq.ft.
Boiler pressure	175 psi
Cylinders	two inside
Cylinder size	19" x 26"

Performance figures
Tractive effort	23,830 lbf

The NER Class W1 was a 4-6-2T steam locomotive of the North Eastern Railway. The class was introduced in 1914 as a rebuild of Wilson Worsdell's NER Class W 4-6-0T (introduced 1907). On being acquired by the London and North Eastern Railway in 1923 the W1s were re-classified A6. The information in the infobox (right) is taken from sources.^[1]^[2]

Modifications

Seven of the locomotives were fitted with superheaters between 1937 and 1944.^[3]

British Railways

One locomotive was withdrawn in 1947 but the remaining nine passed to British Railways in 1948 and were numbered as follows:

Superheated: 69791-69793 and 69796-69797
Non-superheated: 69794-69795 and 69798-69799

This seems to conflict with the claim that seven locomotives were fitted with superheaters but, possibly, the superheater was removed from one locomotive. This might have happened when a boiler was changed.

Withdrawal

One locomotive was withdrawn in 1947 and the others had all been withdrawn by the end of 1951. None are preserved.

References

↑ Ian Allan ABC of British Railways Locomotives, 1948 edition, part 4, page 55
↑ http://www.lner.info/locos/A/a6.shtml
↑ http://www.lner.info/locos/A/a6.shtml

London and North Eastern Railway locomotives

Pre-grouping railway designs:

Great Central:	A5 B1/B18 B2/B19 B3 B4 B5 B6 B7 B8 B9 C4 C5 C13 C14 D5 D6 D7 D8 D9 D10 D11 D12 E2 E3 E8 F1 F2 G3 J8 J9 J10 J11 J12 J13 J58 J59 J60 J61 J62 J63 L1/L3 M1 N4 N5 N6 O4 O5 Q4 S1 X4 Y2

Great Eastern:	B12 D13 D14 D15 D16 E4 F3 F4 F5 F6 F7 G4 J14 J15 J16 J17 J18 J19 J20 J65 J66 J67 J68 J69 J70 N7 Y4 Y5 Y6 Z4/J92

Great North of Scotland:	D38 D39 D40 D41 D42 D43 D44 D45 D46 D47 D48 G10 J90 J91 Z4 Z5

Great Northern:	A1 C1 C2 C12 D1 D2 D3 D4 E1 G1 G2 J1 J2 J3 J4 J5 J6 J7 J50 J51 J52 J53 J54 J55 J56 J57 K1 K2 K3 N1 N2 O1 O2 Q1 Q2 Q3 R1

North British:	C10 C11 C15 C16 D25 D26 D27 D28 D29 D30 D31 D32 D33 D34 D35 D36 D50 D51 E7 G7 G8 G9 J31 J32 J33 J34 J35 J36 J37 J81 J82 J83 J84 J85 J86 J88 N14 N15 Y9 Y10

North Eastern:	A2 A6 A7 B13 B14 B15 B16 C6 C7 C8 D17/1 D17/2 D18 D19 D20 D21 D22 D23 E5 E6 F8 G5 G6 H1 J21 J22 J24 J25 J26 J27 J71 J72 J73 J74 J76 J77 J78 J79 N8 N9 N10 Q5 Q6 Q7 T1 X1 X2 X3 Y7 Y8 EB1 EE1 EF1 ES1

North Eastern (ex Hull & Barnsley)	D24 J23 J28 J75 J80 N11 N12 N13 Q10

LNER designs:

Gresley (1923–1941):	A1 A3 A4 A8 B17 D49 J38 J39 J50 K4 P1 P2 U1 V1 V2 V3 V4 W1 EM1

Thompson (1941–1946):	A1 A2/1 A2/2 A2/3 B1 B2 K1 K5 L1 O1 Q1

Peppercorn (1946–1947):	A1 A2 K1

Other designs:

Proposed designs:

P10 2-8-2T (Nov 1929)
B 4-6-0 (Nov 1936)
? 4-8-2 (1939)
Q 0-8-0 (June 1930)
D 4-4-0 (1943)
? 4-8-4 (Feb 1946)
? 4-8-2 (Feb 1946)
K 2-6-0 (Aug 1947)

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