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Chesapeake & Ohio class H-7
After various Mallets with the wheel arrangement 2-6-6-2, the C&O had the class H-7 built with the wheel arrangement 2-8-8-2. In 1923 and 1924, 25 H-7 were delivered by ALCO and in 1926 20 H-7a by Baldwin followed, wh...
| Chesapeake & Ohio class H-7Remove | |
|---|---|
| Variant | mit Thermosiphons |
| Built | 1923-1926 |
| Manufacturers | ALCO;Baldwin |
| Wheel arrangement | (1D)D1 ma |
| Gauge | 1435 mm |
| Length | |
| Service mass | 257414 kg |
| Top speed | |
| Power | |
| Engine |
General
| Property | Chesapeake & Ohio class H-7 with thermic syphons Remove |
|---|---|
| Built | 1923-1926 |
| Manufacturers | ALCO, Baldwin |
| Wheel arrangement | 2-8-8-2 (Mikado Mallet) |
| Gauge | 1,435 mm |
Dimensions and weights
| Property | Chesapeake & Ohio class H-7 with thermic syphons Remove |
|---|---|
| Wheelbase | 17.70 m |
| Total wheelbase | 31.92 m |
| Service mass | 257.4 t |
| Adhesion mass | 223.7 t |
| Total mass | 428.1 t |
| Rigid wheelbase | 4.80 m |
| Axle load | 29.6 t |
| Water capacity | 79,494 l |
| Fuel capacity | 22.7 t (coal) |
Boiler
| Property | Chesapeake & Ohio class H-7 with thermic syphons Remove |
|---|---|
| Grate area | 10.424 m² |
| Firebox surface | 58.715 m² |
| Tube heating surface | 552.588 m² |
| Evaporative heating surface | 611.303 m² |
| Superheater surface | 171.778 m² |
| Total heating surface | 783.1 m² |
Power plant
| Property | Chesapeake & Ohio class H-7 with thermic syphons Remove |
|---|---|
| Driver diameter | 1,448 mm |
| Boiler pressure | 14.8 bar |
| Expansion type | simple expansion |
| Cylinders | four, 584 x 813 mm |
Power
| Property | Chesapeake & Ohio class H-7 with thermic syphons Remove |
|---|---|
| Power source | steam |
| Estimated power | 3,169 kW (4,309 PS) |
| Starting effort | 482.8 kN |
Calculated values
| Property | Chesapeake & Ohio class H-7 with thermic syphons Remove |
|---|---|
| Factor of adhesion | 1 : 4.54 |
| Optimal speed | 40 km/h |
| Power-to-weight ratio | 12.3 kW/t |
| Heating Surface Equivalent | 1,248.4 m² |
| Cylinder volume/HSE | 1 : 698.06 |
| Adhesive weight/Total | 1 : 1.15 |
| Tractive force/Heating surface | 1 : 12.88 |
| Grate area/Heating surface | 1 : 75.12 |
| Firebox/Tube surface | 1 : 9.41 |
| Total/Superheater | 1 : 3.56 |
