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Western Maryland class K-2
The nine Pacifics of the class K-2 were ordered by the Western Maryland in 1912 and were much heavier than the K-1 from 1909. They had a cylinder diameter that was two inches larger and since they were superheated fro...
General
| Property | Western Maryland class K-2 as built |
|---|---|
| Built | 1912 |
| Manufacturers | Baldwin |
| Wheel arrangement | 4-6-2 (Pacific) |
| Gauge | 1,435 mm (Standard gauge) |
Dimensions and weights
| Property | Western Maryland class K-2 as built |
|---|---|
| Wheelbase | 10.06 m |
| Rigid wheelbase | 3.81 m |
| Total wheelbase | 20.55 m |
| Service weight | 115.3 t |
| Adhesive weight | 72.8 t |
| Axle load | 24.9 t |
| Total weight | 182.5 t |
| Water capacity | 30,283 l |
| Fuel capacity | 13.6 t (coal) |
Boiler
| Property | Western Maryland class K-2 as built |
|---|---|
| Grate area | 5.741 m² |
| Firebox surface | 21.739 m² |
| Tube heating surface | 302.307 m² |
| Evaporative heating surface | 324.046 m² |
| Superheater surface | 70.142 m² |
| Total heating surface | 394.2 m² |
Power plant
| Property | Western Maryland class K-2 as built |
|---|---|
| Driver diameter | 1,753 mm |
| Boiler pressure | 12.8 bar |
| Expansion type | simple expansion |
| Cylinders | two, 610 x 711 mm |
Power
| Property | Western Maryland class K-2 as built |
|---|---|
| Power source | steam |
| Estimated power | 1,752 kW (2,382 PS) |
| Starting effort | 163.5 kN |
Calculated values
| Property | Western Maryland class K-2 as built |
|---|---|
| Factor of adhesion | 1 : 4.37 |
| Optimal speed | 66 km/h |
| Power-to-weight ratio | 15.2 kW/t |
| Heating Surface Equivalent | 573.0 m² |
| Cylinder volume/HSE | 1 : 724.48 |
| Adhesive weight/Total | 1 : 1.58 |
| Tractive force/Heating surface | 1 : 8.66 |
| Grate area/Heating surface | 1 : 68.66 |
| Firebox/Tube surface | 1 : 13.91 |
| Total/Superheater | 1 : 4.62 |
