LMS diesel shunter 1831
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 An official photograph of No. 1831. |
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| Power type | Diesel Hydraulic |
|---|---|
| Builder | LMS, Derby Works |
| Build date | 1931 |
| Configuration | 0-6-0DH |
| Gauge | 4 ft 8½ in (1,435 mm) |
| Wheel diameter | 4 ft 7in |
| Wheelbase | 15 ft 8 in |
| Length | 30 ft 3¾ in (9.2 m) |
| Width | 8 ft 7½ in (2.6 m) |
| Height | 12 ft 9 in (3.9 m) |
| Locomotive weight | 46 tons 2 cwt (46.8 tonnes) |
| Fuel capacity | 140 Imperial gallons (636 litres) |
| Engine type | Davey Paxman 6-cyl of 400 hp (298 kW) at 750 rpm; later 300 hp (224 kW) |
| Transmission | Haslam & Newton |
| Top speed | 25 mph |
| Tractive effort | 22,400 lbf (100 kN); later 20,000 lbf (89 kN) |
| Locomotive brakes | Air brake (independent) |
| Train brakes | Vacuum brake |
| Career | London, Midland and Scottish Railway |
| Number in class | 1 |
| Number | 1831 |
| Delivered | Testing: December 1932; In stock: May 1934 |
| Retired | September 1939 |
| Disposition | Rebuilt 1940 in to mobile power unit; scrapped 1950s |
This was the original experimental shunter, nominally rebuilt by the Midland Railway's Derby Works from a 1377 Class 0-6-0T steam locomotive originally built in September 1892 by the Vulcan Foundry, whose number it inherited (1831), though very little of the steam locomotive was actually re-used. Of itself, it was not very successful, but it did provide useful data for the further development of the diesel shunter design. It was withdrawn from service in September 1939 and converted to a mobile power unit, emerging in its new guise as MPU3 in November 1940. It was scrapped in the 1950s, though sources disagree exactly when.
