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Chesapeake & Ohio class H-8 “Allegheny”
In order to significantly increase speeds of heavy and fast freight trains, the C&O had the H-8 class developed by Lima. The inspiration came from the class A of the Norfolk & Western with the wheel arrangement 2-6-6-...
| Chesapeake & Ohio class H-8 “Allegheny”Remove | |
|---|---|
| Variant | |
| Built | 1941-1944 |
| Manufacturers | Lima |
| Wheel arrangement | (1C)C3 ma |
| Gauge | 1435 mm |
| Length | 38300 mm |
| Service mass | 349856 kg |
| Top speed | 113 km/h |
| Power | |
| Engine |
General
| Property | Chesapeake & Ohio class H-8 “Allegheny”Remove |
|---|---|
| Built | 1941-1944 |
| Manufacturers | Lima |
| Wheel arrangement | 2-6-6-6 (Allegheny) |
| Gauge | 1,435 mm |
Dimensions and weights
| Property | Chesapeake & Ohio class H-8 “Allegheny”Remove |
|---|---|
| Length | 38.30 m |
| Length loco | 23.38 m |
| Wheelbase | 19.05 m |
| Total wheelbase | 34.42 m |
| Service mass | 349.9 t |
| Adhesion mass | 230.4 t |
| Total mass | 544 t |
| Rigid wheelbase | 3.61 m |
| Axle load | 39.3 t |
| Water capacity | 94,635 l |
| Fuel capacity | 22.7 t (coal) |
Boiler
| Property | Chesapeake & Ohio class H-8 “Allegheny”Remove |
|---|---|
| Grate area | 12.561 m² |
| Firebox surface | 70.792 m² |
| Tube heating surface | 601.826 m² |
| Evaporative heating surface | 672.619 m² |
| Superheater surface | 295.989 m² |
| Total heating surface | 968.6 m² |
Power plant
| Property | Chesapeake & Ohio class H-8 “Allegheny”Remove |
|---|---|
| Driver diameter | 1,702 mm |
| Boiler pressure | 17.9 bar |
| Expansion type | simple expansion |
| Cylinders | four, 572 x 838 mm |
Power
| Property | Chesapeake & Ohio class H-8 “Allegheny”Remove |
|---|---|
| Power source | steam |
| Estimated power | 5,966 kW (8,112 PS) |
| Top speed | 113 km/h |
| Starting effort | 490.2 kN |
Calculated values
| Property | Chesapeake & Ohio class H-8 “Allegheny”Remove |
|---|---|
| Factor of adhesion | 1 : 4.61 |
| Optimal speed | 74 km/h |
| Power-to-weight ratio | 17.1 kW/t |
| Heating Surface Equivalent | 1,618.6 m² |
| Cylinder volume/HSE | 1 : 531.38 |
| Adhesive weight/Total | 1 : 1.52 |
| Tractive force/Heating surface | 1 : 10.57 |
| Grate area/Heating surface | 1 : 77.11 |
| Firebox/Tube surface | 1 : 8.50 |
| Total/Superheater | 1 : 2.27 |
