Milwaukee Road class H8
In August 1904, Rogers built five relatively large 4-4-0 for the Southern Indiana Railroad. They carried the works numbers 6228 to 6232, had drivers of 68 inches and cylinders of 18 by 26 inches. In August of the following year, four largely identical locomotives were delivered to the Chicago Southern. Their builder was now called ALCO-Rogers and works numbers were 37559 to 37562. One change was that the drivers now only measured 67 inches.
Later the two railroads formed the Chicago, Terre Haute & Southeastern, what in turn was leased by the Milwaukee Road in 1921. The locomotives were originally numbered 206 to 214 and later 900 to 908. Six of the nine locomotives were retired in November 1934, while the others were used by subsidiaries of the Milwaukee Road on branch lines. After three additional renumberings, they became 97 to 99 in 1945. For example, No. 99 shown in the photo was used by the White Sulfur Springs & Yellowstone Park Railway in its last years. This one was scrapped in September 1949, the other two were scrapped in 1947 and 1951.
Technical data
General
- Built
- 1904-1905
- Manufacturers
- Rogers
- Wheel arrangement
- 4-4-0 (American)
- Gauge
- 1,435 mm (Standard gauge)
Dimensions and weights
- Wheelbase
- 6.96 m
- Total wheelbase
- 15.22 m
- Service mass
- 59.4 t
- Adhesion mass
- 38.8 t
- Total mass
- 110.2 t
- Rigid wheelbase
- 2.44 m
- Water capacity
- 18,927 l
- Fuel capacity
- 9.1 t (coal)
Boiler
- Grate area
- 2.49 m²
- Firebox surface
- 13.75 m²
- Tube heating surface
- 146.88 m²
- Evaporative heating surface
- 160.63 m²
- Total heating surface
- 160.6 m²
Power plant
- Driver diameter
- 1,702 mm
- Boiler pressure
- 12.4 bar
- Expansion type
- simple expansion
- Cylinders
- two, 457 x 660 mm
Power
- Power source
- steam
- Estimated power
- 671 kW (912 PS)
- Starting effort
- 85.6 kN
Calculated values
- Factor of adhesion
- 1 : 4.45
- Optimal speed
- 48 km/h
- Power-to-weight ratio
- 11.3 kW/t
- Heating Surface Equivalent
- 229.4 m²
- Cylinder volume/HSE
- 1 : 945.33
- Adhesive weight/Total
- 1 : 1.53
- Tractive force/Heating surface
- 1 : 11.13
- Grate area/Heating surface
- 1 : 64.51
- Firebox/Tube surface
- 1 : 10.68