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Midland class 1000
In 1902, the Midland Railway had five express locomotives built, numbered 2631 to 2635, designed by Samuel Waite Johnson. The special feature was the power plant, which consisted of three cylinders with compound actio...
General
| Property | Midland class 1000 superheated |
|---|---|
| Built | 1914 |
| Manufacturers | Derby |
| Wheel arrangement | 4-4-0 (American) |
| Gauge | 1,435 mm (Standard gauge) |
Dimensions and weights
| Property | Midland class 1000 superheated |
|---|---|
| Length | 18.54 m |
| Wheelbase | 7.39 m |
| Rigid wheelbase | 2.92 m |
| Total wheelbase | 14.71 m |
| Service weight | 60.9 t |
| Adhesive weight | 39.7 t |
| Total weight | 104 t |
| Water capacity | 15,910 l |
| Fuel capacity | 6.1 t (coal) |
Boiler
| Property | Midland class 1000 superheated |
|---|---|
| Grate area | 2.64 m² |
| Firebox surface | 14.03 m² |
| Tube heating surface | 108.7 m² |
| Evaporative heating surface | 122.73 m² |
| Superheater surface | 26.94 m² |
| Total heating surface | 149.7 m² |
Power plant
| Property | Midland class 1000 superheated |
|---|---|
| Driver diameter | 2,134 mm |
| Boiler pressure | 15.2 bar |
| Expansion type | compound |
| Cylinders | three, HP: 483 x 660 mm and LP: 533 x 660 mm |
Power
| Property | Midland class 1000 superheated |
|---|---|
| Power source | steam |
| Estimated power | 932 kW (1,267 PS) |
| Starting effort | 76.7 kN |
| Starting effort simple | 92.0 kN |
Calculated values
| Property | Midland class 1000 superheated |
|---|---|
| Factor of adhesion | 1 : 5.08 |
| Optimal speed | 74 km/h |
| Power-to-weight ratio | 15.3 kW/t |
| Heating Surface Equivalent | 246.8 m² |
| Cylinder volume/HSE | 1 : 1,182.85 |
| Adhesive weight/Total | 1 : 1.53 |
| Tractive force/Heating surface | 1 : 10.70 |
| Grate area/Heating surface | 1 : 56.69 |
| Firebox/Tube surface | 1 : 7.75 |
| Total/Superheater | 1 : 4.56 |
