Western Maryland class H-3c
In 1892, the West Virginia Central & Pittsburgh was one of the railroads which bought Vauclain compounds from Baldwin to test their suitability. They decided that Kent Ridge north of Davis City would be a topographically challenging line and so they ordered their numbers 28 and 29 as Consolidations. Their four cylinders had diameters of 15 and 22 inches, while the stroke was 26 inches. With a driver diameter of only 50 inches, they could deliver a starting tractive effort of 29,328 pounds in simple mode and 24,440 pounds in compound mode.
When the WVC&P became part of the Western Maryland in 1905, the two locomotives became class H-3c No. 347 and 348. Some years later they were simpled with two cylinders with a diameter of 19 inches. No. 347 was sold to the Virginia Central in 1920 which scrapped it in 1938. No. 348 was used by the Western Maryland until 1952.
Technical data
General
| Property | as built | simpled |
|---|---|---|
| Built | 1892 | |
| Manufacturers | Baldwin | |
| Wheel arrangement | 2-8-0 (Consolidation) | |
| Gauge | 1,435 mm (Standard gauge) | |
Dimensions and weights
| Property | as built | simpled |
|---|---|---|
| Wheelbase | 6.63 m | |
| Total wheelbase | 15.14 m | |
| Service mass | 57.2 t | 58.8 t |
| Adhesion mass | 49.9 t | 53.6 t |
| Rigid wheelbase | 4.27 m | |
| Water capacity | 11,356 l | 15,899 l |
| Fuel capacity | 8.2 t (coal) | |
| Total mass | 98.9 t | |
| Axle load | 13.8 t | |
Boiler
| Property | as built | simpled |
|---|---|---|
| Grate area | 2.694 m² | |
| Firebox surface | 12.914 m² | 13.285 m² |
| Tube heating surface | 163.324 m² | 163.417 m² |
| Evaporative heating surface | 176.237 m² | 176.702 m² |
| Total heating surface | 176.2 m² | 176.7 m² |
Power plant
| Property | as built | simpled |
|---|---|---|
| Driver diameter | 1,270 mm | |
| Boiler pressure | 12.4 bar | 11.7 bar |
| Expansion type | compound | simple expansion |
| Cylinders | four, HP: 381 x 660 mm and LP: 559 x 660 mm | two, 483 x 660 mm |
Power
| Property | as built | simpled |
|---|---|---|
| Power source | steam | |
| Estimated power | 597 kW (812 PS) | |
| Starting effort | 108.7 kN | 120.7 kN |
| Starting effort simple | 130.5 kN | |
Calculated values
| Property | as built | simpled |
|---|---|---|
| Factor of adhesion | 1 : 4.50 | 1 : 4.36 |
| Optimal speed | 34 km/h | 31 km/h |
| Power-to-weight ratio | 10.4 kW/t | 10.2 kW/t |
| Heating Surface Equivalent | 240.8 m² | 243.1 m² |
| Cylinder volume/HSE | 1 : 1,297.90 | 1 : 993.73 |
| Adhesive weight/Total | 1 : 1.15 | 1 : 1.10 |
| Tractive force/Heating surface | 1 : 12.88 | 1 : 14.26 |
| Grate area/Heating surface | 1 : 65.42 | 1 : 65.59 |
| Firebox/Tube surface | 1 : 12.65 | 1 : 12.30 |