LMS Class 7F 0-8-0
From Wikipedia, the free encyclopedia
The London, Midland and Scottish Railway Fowler Class 7F steam locomotive was an update of the London and North Western Railway (LNWR) G2 Class 0-8-0. The class were sometimes known as 'Baby Austins', or Austin 7s, after a motor car that was becoming popular at the time. This was probably a derogatory nickname, implying that it was underpowered.
Contents |
[edit] Overview
It featured a Belpaire firebox and increased boiler pressure over its predecessor but had the same power rating of 7F. Unfortunately the design had been done at the old Midlands's Derby Works and the drawing office staff insisted on using Midland practice. Among other things this meant that the axle bearings were too small for the loads they had to carry. All 175 were built at Crewe.
| Number | Lot No. | Date built | Maker's Nos. | |
|---|---|---|---|---|
| LMS | BR | |||
| 9500-99 | 49500-99 | 57 | 1929 | 6872-5971 |
| 9600-2 | 49600-2 | 71 | 1930 | 6047-9 |
| 9603-19 | 49603-19 | 71 | 1931 | 6050-66 |
| 9620-32 | 49620-32 | 81 | 1931 | 1-13 |
| 9633 | 49633 | 81 | 1932 | 14 |
| 9634/5 | 49634/5 | 81 | 1931 | 15/6 |
| 9636-59 | 49636-59 | 81 | 1932 | 17-40 |
| 9660-74 | 49660-74 | 84 | 1932 | 41-55 |
9672-4 were fitted with ACFI feedwater heaters when built but these were removed during the war. After the war five were briefly converted to oil burning.
They all survived to pass into British Railways ownership, but there were only 19 left by the end of January 1959. They had a fairly short life and were all withdrawn between 1949 and 1962 some time before the G2s which lasted until 1964.
[edit] Dimensions
- LMS/BR Power classification, 7F
- Locomotive weight, 60 tons 15 cwt
- Tender weight, Not known
- Boiler pressure, 200 psi
- Superheater, Yes
- Cylinders, 19½"x26"
- Driving wheel diameter, 4' 8½"
- Tractive effort, 29,745 lb
- Valve gear, Walschaert (piston valves)
For terminology, see Steam locomotive components
[edit] Sources
- Ian Allan ABC of British Railways Locomotives, summer 1961 edition, part 3, page 52
[edit] External links
| Hughes: | 5MT Crab |
| Fowler: | 2P 4-4-0 - 2F Dock Tank - 3MT 2-6-2T - 3F Jinty - 4P Compound - 4MT 2-6-4T - 4F 0-6-0 - 6P Patriot - 7P Royal Scot - 7F 0-8-0 - Garratt - 6399 Fury |
| Stanier: | 2P 0-4-4T - 3MT 2-6-2T - 4MT 2-6-4T (2 cylinders) - 4MT 2-6-4T (3 cylinders) - 5MT 2-6-0 - 5MT Black Five - 6P Jubilee - 8P Princess Royal - 8P Coronation - 8F 2-8-0 - Turbomotive |
| Kitson: | 0F 0-4-0ST |
| Fairburn: | 4MT 2-6-4T |
| Ivatt: | 2MT 2-6-0 - 2MT 2-6-2T - 4MT 2-6-0 |
| Locomotives of: | BR (steam) • GWR • LNER • Southern |
