London & North Eastern classes V1 and V3
Great Britain 1930 92 produced
Gresley developed the V1 as a powerful tank locomotive for suburban lines. Its drive consisted of three cylinders cast in one piece. 82 V1 were built between 1930 and 1939, which were initially used in the Glasgow and Edinburgh area. These were followed by ten V3, which had a boiler pressure that was 20 psi higher. From 1948, a total of 71 V1 were rebuilt to V3 by the LNER and by British Railways. Their withdrawals took place between 1960 and 1964.
Technical data
General
| Property | V1 | V3 |
|---|---|---|
| Built | 1930-1939 | 1939-1940 |
| Manufacturers | Doncaster | |
| Wheel arrangement | 2-6-2T (Prairie) | |
| Gauge | 1,435 mm (Standard gauge) | |
Dimensions and weights
| Property | V1 | V3 |
|---|---|---|
| Wheelbase | 9.83 m | |
| Service mass | 58 t | 59 t |
| Axle load | 19.6 t | 20.3 t |
| Water capacity | 9,093 l | |
| Fuel capacity | 4.1 t (coal) | 4.6 t (coal) |
Boiler
| Property | V1 | V3 |
|---|---|---|
| Grate area | 2.044 m² | |
| Firebox surface | 11.799 m² | |
| Tube heating surface | 111.205 m² | |
| Evaporative heating surface | 123.004 m² | |
| Superheater surface | 26.384 m² | |
| Total heating surface | 149.4 m² | |
Power plant
| Property | V1 | V3 |
|---|---|---|
| Driver diameter | 1,727 mm | |
| Boiler pressure | 12.4 bar | 13.8 bar |
| Expansion type | simple expansion | |
| Cylinders | three, 406 x 660 mm | |
Power
| Property | V1 | V3 |
|---|---|---|
| Power source | steam | |
| Estimated power | 820 kW (1,115 PS) | |
| Starting effort | 99.9 kN | 111.0 kN |
Calculated values
| Property | V1 | V3 |
|---|---|---|
| Optimal speed | 50 km/h | 45 km/h |
| Power-to-weight ratio | 14.1 kW/t | 13.9 kW/t |
| Heating Surface Equivalent | 234.8 m² | |
| Cylinder volume/HSE | 1 : 1,094.68 | |
| Tractive force/Heating surface | 1 : 13.97 | 1 : 15.52 |
| Grate area/Heating surface | 1 : 73.09 | |
| Firebox/Tube surface | 1 : 9.42 | |
| Total/Superheater | 1 : 4.66 | |
