LMS Compound 4-4-0
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 41199 at Derby in 1948, recently outshopped with "British Railways" on her tender. |
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| Power type | Steam |
|---|---|
| Builder | LMS Derby (75) LMS Horwich (20); North British Locomotive Company (25) Vulcan Foundry (75) |
| Build date | 1924–1932 |
| Gauge | 4 ft 8½ in (1,435 mm) |
| Leading wheel size | 42.5 in (1.080 m) |
| Driver size | 81 in (2.057 m) |
| Wheelbase | Loco: 24.25 ft (7.391 m) |
| Length | 56.65625 ft (17.269 m) |
| Locomotive weight | Loco: 61.7 long tons (62.7 t) Tender: 41.2–41.7 long tons |
| Tender capacity | Water: 3,500 imp gal (16,000 l) Coal: 4, 5, or 5.5 long tons |
| Boiler | G9AS |
| Boiler pressure | 200 psi (1.38 MPa) |
| Fire grate area | 28.5 sq ft (2.65 m²) |
| Heating surface: Tubes | 1,170 sq ft (109 m²) |
| Heating surface: Firebox | 147 sq ft (13.7 m²) |
| Superheater area | 290 sq ft (27 m²) or 272 sq ft (25.3 m²) |
| Cylinders | HP: 1 (inside) LP: 2 (outside) |
| High-pressure cylinder size |
19×26 in |
| Low-pressure cylinder size |
21×26 in |
| Valve gear | Stephenson |
| Tractive effort | 22,650 lbf (100.8 kN) |
| Train brakes | Vacuum |
| Career | London, Midland and Scottish Railway British Railways |
| Class | 4P |
| Number in class | 195 |
| Number | LMS 900–939, 1045–1199 |
The London, Midland and Scottish Railway Compound 4-4-0 was a class of steam locomotive designed for passenger work.
Contents |
[edit] Overview
One hundred and ninety five engines were built by the LMS, adding to the 45 Midland Railway 1000 Class, to which they were almost identical. The most obvious difference is that the driving wheel diameter was reduced from 7' 0" on the Midland locomotive to 6' 9" on the LMS version. They were given the power classification 4P.
The LMS continued the Midland numbering from 1045 to 1199 and then started in the lower block of 900-39. After nationalisation in 1948, BR added 40000 to their numbers so they became 40900-39 and 41045-199.
None has survived to preservation, though the first of the Midland 1000 Class engines has.
[edit] Dimensions
- LMS/BR Power classification, 4P
- Locomotive weight, 61 tons 14 cwt
- Boiler pressure, 200 psi
- Superheater, Yes
- Cylinders:
- One high pressure, 19"x26" (piston valves)
- Two low pressure, 21"x26" (slide valves)
- Driving wheel diameter, 6' 9"
- Tractive effort, 22,650 lb (LP cylinders at 80% pressure)
- Valve gear, Stephenson
For terminology, see Steam locomotive components
[edit] Sources
- Ian Allan ABC of British Railways Locomotives, 1948 Edition, part 3, pp 5-6
[edit] External links
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