NER Class W1

NER Class W1 LNER Class A6
Power type	Steam
Build date	1914-1917 (rebuild)
Total produced	10
Configuration	4-6-2T
Gauge	4' 8½"
Leading wheel diameter	3' 1¼"
Driver diameter	5' 1¼"
Length	43' 11"
Locomotive weight	78 long tons without superheater 79 long tons with superheater
Fuel type	coal
Fuel capacity	4 long tons
Water capacity	1,893 imperial gallons
Boiler pressure	175 psi
Firegrate area	23 sq.ft.
Cylinders	two inside
Cylinder size	19" x 26"
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One locomotive was withdrawn in 1947 but the remaining nine passed to British Railways in 1948 and were numbered as follows: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One locomotive was withdrawn in 1947 and the others had all been withdrawn by the end of 1951.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 is preserved.

References

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

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