Milwaukee Road “James Toleman”
United States 1893 1 produced
The “James Toleman” was designed by Frederick Charles Winby to test the installation of a long firebox between uncoupled axles. Each axle had its own cylinders, with the inner cylinders driving the first driving axle. Thus lone coupling rods could be avoided. The boiler was oval in cross-section to be fitted between large wheels. After attending the Columbian Exposition, it was given to the Milwaukee Road for trials. However, it quickly became apparent that it repeatedly had too little steam and parts regularly broke. Even a lengthy visit by Winby to the USA could not solve the problems that had arisen.
Technical data
General
- Built
- 1893
- Manufacturers
- Hawthorn, Leslie & Co.
- Wheel arrangement
- 4-2-2-0
- Gauge
- 1,435 mm (Standard gauge)
Dimensions and weights
- Service mass
- 54.4 t
- Adhesion mass
- 31.8 t
- Axle load
- 15.9 t
Boiler
- Grate area
- 2.601 m²
- Firebox surface
- 16.964 m²
- Tube heating surface
- 168.842 m²
- Evaporative heating surface
- 185.806 m²
- Total heating surface
- 185.8 m²
Power plant
- Driver diameter
- 2,286 mm
- Boiler pressure
- 12.1 bar
- Expansion type
- simple expansion
- Cylinders
- four, 432 x 559 mm
Power
- Power source
- steam
- Estimated power
- 559 kW (760 PS)
- Starting effort
- 93.5 kN
Calculated values
- Factor of adhesion
- 1 : 3.33
- Optimal speed
- 37 km/h
- Power-to-weight ratio
- 10.3 kW/t
- Heating Surface Equivalent
- 270.6 m²
- Cylinder volume/HSE
- 1 : 1,209.49
- Adhesive weight/Total
- 1 : 1.71
- Tractive force/Heating surface
- 1 : 10.51
- Grate area/Heating surface
- 1 : 71.44
- Firebox/Tube surface
- 1 : 9.95
