L&YR Class 8
| Lancashire & Yorkshire Railway Class 8 (first batch) | |
|---|---|
| Specifications | |
| Power type | Steam |
| Designer | George Hughes |
| Build date | 1908–1909 |
| Total produced | 20 |
| Configuration | 4-6-0 |
| UIC classification | 2'C |
| Gauge | 4 ft 8 1⁄2 in (1,435 mm) |
| Driver diameter | 6 ft 3 in (1.905 m) |
| Locomotive weight | 77.05 long tons (78.29 t) |
| Boiler pressure | 180 psi (1.24 MPa) |
| Cylinders | Four |
| Cylinder size | 16 in × 26 in (406 mm × 660 mm) |
| Valve gear | Joy |
| Tractive effort | 23,165 lbf (103.0 kN) |
| Train brakes | Vacuum |
| Career | |
| Railroad(s) | L&YR, LMS |
| Class | L&YR: 8 |
| Power class | LMS: 3P |
| Number |
L&YR: 1506–1525 LMS:10400–10419 |
| Withdrawn | 1925–1926 |
| Disposition | 15 rebuilt 1919–1920, remainder scrapped |
| Lancashire & Yorkshire Railway Class 8 (second batch) | |
|---|---|
| Specifications | |
| Power type | Steam |
| Only items that differ are shown below | |
| Builder | Horwich Works |
| Order number | LMS Lot No. 1 |
| Build date | 1919–1925 |
| Total produced |
15 rebuilt from first batch, 55 new |
| Driver diameter | 6 ft 3 in (1.905 m) |
| Locomotive weight | 79.05 long tons (80.32 t) |
| Cylinders | Four |
| Cylinder size | 16.5 in × 26 in (419 mm × 660 mm) or 15.75 in × 26 in (400 mm × 660 mm) |
| Valve gear | Walschaers |
| Tractive effort | 28,880 lbf (128.5 kN) or 26,315 lbf (117.1 kN) |
| Train brakes | Vacuum |
| Career | |
| Railroad(s) | L&YR, LMS |
| Power class | LMS: 5P |
| Number |
L&YR: 1506-1525 (excl 1507/8, 1512/3, 1515), 1649–1683 LMS:10405–10474 |
| Withdrawn | 1934–1951 |
| Disposition | All scrapped |
The Lancashire and Yorkshire Railway class 8 was a four-cylinder 4-6-0 express passenger locomotive designed by George Hughes in 1908. These original locomotives were described as “poor performers” . They suffered coal consumption as high as 100 pounds per mile plus mechanical problems causing very poor reliability. Around the time of their construction, they were nicknamed "Dreadnoughts" on account of their large size, after the then-new Royal Navy battleship HMS Dreadnought.
Rebuilding
As designed, they were fitted with Joy valve gear. In 1919–20, fifteen were rebuilt with Walschaerts valve gear and slightly larger cylinders, with piston valves instead of slide valves, and with superheating. The nominal tractive effort of the rebuilds was 28,879 lbs which made these engines for a time the most powerful in Great Britain until 1922 when the Gresley pacifics appeared. The rebuilt locomotives were reported to be "a good workmanlike engine"[1] and "an engine thoroughly master of its work",[2] although still with a coal consumption on the heavy side.
New locomotives
Fourteen more of these Walschaerts valve gear locomotives were built before grouping, and a further 41 after the creation of the London, Midland and Scottish Railway. The last 20 of these were originally part of the 30-locomotive order for the related L&YR Hughes 4-6-4T.
Compound conversion
No 10456 was converted to a 4-cylinder compound in July 1926
Withdrawal
The relatively early withdrawal of most units must be considered in the context that the LMS inherited 393 different locomotive classes at Grouping, and LMS chairman Sir Josiah Stamp thought it desirable to reduce this to just 10 classes.[3]
Notes
References
- Casserley, H.C. & Johnston, Stuart W. (1974) [1966]. Locomotives at the Grouping 3: London, Midland and Scottish Railway. Shepperton, Surrey: Ian Allan. ISBN 0-7110-0554-0.
- Rowledge, J.W.P. (1975). Engines of the LMS built 1923–51. Oxford: Oxford Publishing Company. ISBN 0-902888-59-5.
- Mason, Eric (1975) [1954]. The Lancashire and Yorkshire Railway in the Twentieth Century. Shepperton, Surrey: Ian Allan. ISBN 0-7110-0656-3.
- Nock, O.S. (1969). The Lancashire and Yorkshire Railway - a Concise History. Shepperton, Surrey: Ian Allan. ISBN 0-7110-0130-8.
- Hunt, David; Jennison, John; James, Fred; Essery, Bob (2006). LMS Locomotive Profiles, no. 7 - The Mixed Traffic Class 5s, Caprotti valve gear engines and class summary. Didcot, Oxon: Wild Swan. ISBN 1-905184-21-2.
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