London, Midland & Scottish Nr. 1831
Great Britain 1931 1 produced
No. 1831 was the first diesel shunter in the UK. It was rebuilt in 1931 from a 39 year old 0-6-0T of the class 1377. The running gear of the steam locomotive was retained and mated to a boxcab-style locomotive body that housed all equipment and cabs. Power came from a 400 hp six-cylinder Davey Paxman that transmitted its power through a hydraulic Haslam & Newton transmission onto a crank axle and coupling rods. After testing the locomotive was put into regular shunting service in 1934, but went into storage in 1936. Later it was rebuilt into the mobile power unit MPU3 with its output reduced to 300 hp. After serving this task it was scrapped in 1951.
Technical data
General
| Property | as built | rebuilt |
|---|---|---|
| Built | 1931 | |
| Manufacturers | Derby | |
| Wheel arrangement | C | |
| Gauge | 1,435 mm (Standard gauge) | |
Dimensions and weights
| Property | as built | rebuilt |
|---|---|---|
| Length | 9.24 m | |
| Wheelbase | 4.78 m | |
| Service mass | 45.8 t | |
| Adhesion mass | 45.8 t | |
| Rigid wheelbase | 4.78 m | |
| Axle load | 15.3 t | |
Power plant
| Property | as built | rebuilt |
|---|---|---|
| Engine | Davey Paxman | |
| Engine type | 6-cyl. diesel | |
Power
| Property | as built | rebuilt |
|---|---|---|
| Power source | diesel-hydraulic | |
| Indicated power | 298 kW (405 PS) | 224 kW (305 PS) |
| Top speed | 40 km/h | |
| Starting effort | 99.6 kN | 89.0 kN |
Calculated values
| Property | as built | rebuilt |
|---|---|---|
| Factor of adhesion | 1 : 4.51 | 1 : 5.05 |
| Power-to-weight ratio | 6.5 kW/t | 4.9 kW/t |
| Adhesive weight/Total | 1 : 1.00 | |
