Western Maryland class H-4
United States 1901 16 produced
The H-4 class includes a total of 16 Consolidations built by Baldwin, divided into ten of the actual class H-4 from 1901 and six H-4a of 1903. Some sources state that like the H-4b, these were originally built for the West Virginia Central & Pittsburgh and only came to Western Maryland in 1905.
While most of the locomotives were retired between 1927 and 1931, the 401 and 409 came to the Chesapeake Beach Railway. The 409 rejoined the Western Maryland in 1935. Four units were sold to the Vang Construction Company. The 406 and 416 survived to 1941 and 1946, respectively.
Technical data
General
- Built
- 1901, 1903
- Manufacturers
- Baldwin
- Wheel arrangement
- 2-8-0 (Consolidation)
- Gauge
- 1,435 mm (Standard gauge)
Dimensions and weights
- Wheelbase
- 7.21 m
- Total wheelbase
- 16.08 m
- Service mass
- 72.1 t
- Adhesion mass
- 64.2 t
- Total mass
- 124 t
- Rigid wheelbase
- 4.67 m
- Axle load
- 16.3 t
- Water capacity
- 30,283 l
- Fuel capacity
- 10.9 t (coal)
Boiler
- Grate area
- 3.307 m²
- Firebox surface
- 17.744 m²
- Tube heating surface
- 194.539 m²
- Evaporative heating surface
- 212.284 m²
- Total heating surface
- 212.3 m²
Power plant
- Driver diameter
- 1,422 mm
- Boiler pressure
- 12.4 bar
- Expansion type
- simple expansion
- Cylinders
- two, 559 x 711 mm
Power
- Power source
- steam
- Estimated power
- 708 kW (963 PS)
- Starting effort
- 164.7 kN
Calculated values
- Factor of adhesion
- 1 : 3.82
- Optimal speed
- 26 km/h
- Power-to-weight ratio
- 9.8 kW/t
- Heating Surface Equivalent
- 301.0 m²
- Cylinder volume/HSE
- 1 : 1,158.92
- Adhesive weight/Total
- 1 : 1.12
- Tractive force/Heating surface
- 1 : 16.20
- Grate area/Heating surface
- 1 : 64.19
- Firebox/Tube surface
- 1 : 10.96
