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London & North Eastern Peppercorn class A1
The Peppercorn class A1 was a Pacific that has been designed for the LNER, but was only introduced after the founding of British Railways. It had three cylinders and a double Kylchap blast pipe . In 1948 and 1949, 49 ...
General
| Property | London & North Eastern Peppercorn class A1Remove |
|---|---|
| Built | 1948-1949, 2008 |
| Manufacturers | Doncaster, Darlington |
| Wheel arrangement | 4-6-2 (Pacific) |
| Gauge | 1,435 mm (Standard gauge) |
Dimensions and weights
| Property | London & North Eastern Peppercorn class A1Remove |
|---|---|
| Length | 22.24 m |
| Wheelbase | 11.05 m |
| Rigid wheelbase | 4.57 m |
| Total wheelbase | 19.03 m |
| Service weight | 106.9 t |
| Adhesive weight | 67.6 t |
| Axle load | 22.5 t |
| Total weight | 168.8 t |
| Water capacity | 22,731 l |
| Fuel capacity | 9.1 t (coal) |
Boiler
| Property | London & North Eastern Peppercorn class A1Remove |
|---|---|
| Grate area | 4.645 m² |
| Firebox surface | 22.789 m² |
| Tube heating surface | 205.883 m² |
| Evaporative heating surface | 228.672 m² |
| Superheater surface | 64.819 m² |
| Total heating surface | 293.5 m² |
Power plant
| Property | London & North Eastern Peppercorn class A1Remove |
|---|---|
| Driver diameter | 2,032 mm |
| Boiler pressure | 17.2 bar |
| Expansion type | simple expansion |
| Cylinders | three, 483 x 660 mm |
Power
| Property | London & North Eastern Peppercorn class A1Remove |
|---|---|
| Power source | steam |
| Indicated power | 2,013 kW (2,737 PS) |
| Top speed | 161 km/h |
| Starting effort | 166.4 kN |
Calculated values
| Property | London & North Eastern Peppercorn class A1Remove |
|---|---|
| Factor of adhesion | 1 : 3.99 |
| Optimal speed | 74 km/h |
| Power-to-weight ratio | 18.8 kW/t |
| Heating Surface Equivalent | 472.3 m² |
| Cylinder volume/HSE | 1 : 767.39 |
| Adhesive weight/Total | 1 : 1.58 |
| Tractive force/Heating surface | 1 : 11.84 |
| Grate area/Heating surface | 1 : 63.18 |
| Firebox/Tube surface | 1 : 9.03 |
| Total/Superheater | 1 : 3.53 |
