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London, Midland & Scottish Royal Scot class
The LMS inherited the many light locomotives from the Midland Railway, which were very often used double-headed. For example, heavy express trains on the West Coast Main Line were mostly seen behind either a pair of t...
General
| Property | London, Midland & Scottish Royal Scot class Rebuilt Scot |
|---|---|
| Built | 1943-1955 |
| Manufacturers | North British, Derby |
| Wheel arrangement | 4-6-0 (Ten-wheeler) |
| Gauge | 1,435 mm (Standard gauge) |
Dimensions and weights
| Property | London, Midland & Scottish Royal Scot class Rebuilt Scot |
|---|---|
| Length | 19.22 m |
| Length loco | 12.52 m |
| Wheelbase | 8.38 m |
| Rigid wheelbase | 4.67 m |
| Service weight | 84.3 t |
| Adhesive weight | 62 t |
| Axle load | 20.7 t |
| Total weight | 139.9 t |
| Water capacity | 18,185 l |
| Fuel capacity | 9.1 t (coal) |
Boiler
| Property | London, Midland & Scottish Royal Scot class Rebuilt Scot |
|---|---|
| Grate area | 2.899 m² |
| Firebox surface | 18.116 m² |
| Tube heating surface | 154.87 m² |
| Evaporative heating surface | 172.986 m² |
| Superheater surface | 32.33 m² |
| Total heating surface | 205.3 m² |
Power plant
| Property | London, Midland & Scottish Royal Scot class Rebuilt Scot |
|---|---|
| Driver diameter | 2,057 mm |
| Boiler pressure | 17.2 bar |
| Expansion type | simple expansion |
| Cylinders | three, 457 x 660 mm |
Power
| Property | London, Midland & Scottish Royal Scot class Rebuilt Scot |
|---|---|
| Power source | steam |
| Estimated power | 1,715 kW (2,332 PS) |
| Starting effort | 147.5 kN |
Calculated values
| Property | London, Midland & Scottish Royal Scot class Rebuilt Scot |
|---|---|
| Factor of adhesion | 1 : 4.12 |
| Optimal speed | 71 km/h |
| Power-to-weight ratio | 20.3 kW/t |
| Heating Surface Equivalent | 328.2 m² |
| Cylinder volume/HSE | 1 : 990.96 |
| Adhesive weight/Total | 1 : 1.36 |
| Tractive force/Heating surface | 1 : 15.00 |
| Grate area/Heating surface | 1 : 70.82 |
| Firebox/Tube surface | 1 : 8.55 |
| Total/Superheater | 1 : 5.35 |
