LMS Fowler Class 4F
|LMS Fowler Class 4F|
44444 at Stockport, 1950
|Type and origin|
|UIC classification||C h2|
|Gauge||4 ft 8 1⁄2 in (1,435 mm)|
|Driver diameter||5 ft 3 in (1.600 m)|
|Length||52 ft 0 1⁄8 in (15.853 m)|
|Locomotive weight||48.75 long tons (49.53 t)|
|Tender weight||41.20 long tons (41.86 t)|
|Fuel capacity||4 long tons (4.1 t)|
|Water capacity||3,500 imp gal (16,000 l; 4,200 US gal)|
|Boiler||LMS type G7S|
|Boiler pressure||175 lbf/in2 (1.21 MPa)|
|Firegrate area||21 sq ft (2.0 m2)|
– Tubes and flues
|1,034 sq ft (96.1 m2)|
|– Firebox||124 sq ft (11.5 m2)|
|Superheater area||252 sq ft (23.4 m2) later 246 sq ft (22.9 m2)|
|Cylinder size||20 in × 26 in (510 mm × 660 mm)|
|Valve type||Piston valves|
|Tractive effort||24,555 lbf (109.23 kN)|
|Axle load class||BR: Route Availability 5|
|Disposition||3 Preserved, remainder scrapped|
The London Midland and Scottish Railway (LMS) Fowler 4F is a class of 0-6-0 steam locomotive designed for medium freight work. They represent the ultimate development of Midland Railway's six coupled tender engines. Many trainspotters knew them as "Duck Sixes", a nickname derived from their wheel arrangement.
The 4F was based on the 197-strong Midland Railway 3835 Class of 1911, with only a few modifications, primarily the adoption of left-hand drive in favour of right-hand drive. They originally had been designed by Henry Fowler, who from 1925 became CME of the LMS.
Midland Railway locomotives were notorious for their short axle-box bearings, which were prone to overheating. Why this poor design feature was perpetuated is a complete mystery but, unfortunately, the LMS 4F inherited it.
The LMS constructed 530 of the locomotives between 1923 and 1928, numbered sequentially from where the Midland engines left off from 4027. A further 45 examples were reluctantly authorised by William Stanier in 1937 at the behest of the operating department.
|LMS nos.||BR nos.||Lot No.||Date built||Built by|
|4057–4081||44057–44081||8||1925||North British Loco|
|4382–4399||44382–44399||33||1926||North British Loco|
|4400–4406||44400–44406||33||1927||North British Loco|
|4477–4506||44477–44506||46||1927||North British Loco|
All entered British Railways stock in 1948. BR added 40000 to their numbers. They were all withdrawn between 1959 and 1966.
Accidents and incidents
- On 12 February 1929, locomotive No. 4491 was hauling a freight train that was in a head-on collision with an express passenger train at Doe Hill station, Derbyshire due to a signalman's error. Two people were killed.
- On 4 September 1942, locomotive No. 4541 was hauling a freight train that overran the end of a loop in blackout conditions at Todmorden, Yorkshire and was derailed.
- On 6 June 1961, a locomotive of the class was running light when it was in a head-on collision with a freight train at Carlisle Citadel station, Cumberland.
Withdrawals from stock occurred between 1959 and 1966.
|4027||44027||Gloucestershire Warwickshire Railway||Recently transferred from the Midland Railway - Butterley, overhaul now started and making steady progress|
|4123||44123||Avon Valley Railway||Restoration in progress|
|4422||44422||Peak Rail||Stored following a failed boiler examination|
- David Hunt, John Jennison Bob Essery & Fred James LMS Locomotive Profiles No.10: The Standard Class 4 Goods 0-6-0s ISBN 1-905184-35-2 (pictorial supplement ISBN 1-905184-37-9)
- Rowledge, J.W.P (1975). Engines of the LMS, built 1923–51. Oxford: Oxford Publishing Company. ISBN 0-902888-59-5.
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