Toledo, Peoria & Western class H-10
In 1937, ALCO-Schenectady delivered six 4-8-4 locomotives to the Toledo, Peoria & Western Railway which were intended for fast freight service. They were designated class H-10 and got the running numbers 80 to 85. At only 361,000 pounds, these were the lightest Northerns ever delivered to any American Railroad.
They even had an adhesive weight 30,000 pounds lower than that of the class H-8/H-9 Consolidations which were 30 years older. To still create enough power, they had arch tubes and thermic syphons. With drivers of 69 inches (1,753 mm) and cylinders measuring 23.5 by 30 inches, they exerted a starting tractive effort of 51,000 pounds (227 kN). After a service life of only 13 years, they were all scrapped in 1950 and ended the steam era of the TP&W.
Technical data
General
- Built
- 1937
- Manufacturers
- ALCO
- Wheel arrangement
- 4-8-4 (Northern)
- Gauge
- 1,435 mm (Standard gauge)
Dimensions and weights
- Wheelbase
- 13.49 m
- Total wheelbase
- 27.25 m
- Service mass
- 163.7 t
- Adhesion mass
- 92.5 t
- Total mass
- 310.7 t
- Rigid wheelbase
- 5.56 m
- Axle load
- 23.1 t
- Water capacity
- 68,137 l
- Fuel capacity
- 16.3 t (coal)
Boiler
- Grate area
- 7.181 m²
- Firebox surface
- 41.156 m²
- Tube heating surface
- 326.833 m²
- Evaporative heating surface
- 367.989 m²
- Superheater surface
- 101.822 m²
- Total heating surface
- 469.8 m²
Power plant
- Driver diameter
- 1,753 mm
- Boiler pressure
- 17.2 bar
- Expansion type
- simple expansion
- Cylinders
- two, 597 x 762 mm
Power
- Power source
- steam
- Estimated power
- 3,132 kW (4,258 PS)
- Starting effort
- 227.0 kN
Calculated values
- Factor of adhesion
- 1 : 4.00
- Optimal speed
- 84 km/h
- Power-to-weight ratio
- 19.1 kW/t
- Heating Surface Equivalent
- 777.4 m²
- Cylinder volume/HSE
- 1 : 548.56
- Adhesive weight/Total
- 1 : 1.77
- Tractive force/Heating surface
- 1 : 10.09
- Grate area/Heating surface
- 1 : 65.42
- Firebox/Tube surface
- 1 : 7.94
- Total/Superheater
- 1 : 3.61
