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Boston & Maine class K-8
The K-8 was the last class of Consolidations ordered by the Boston & Maine. Although originally designed with a saturated boiler , it weighed more than 200,000 pounds , compared to less than 180,000 pounds for all pre...
General
| Property | Boston & Maine class K-8 saturated |
|---|---|
| Built | 1911 |
| Manufacturers | Baldwin, ALCO |
| Wheel arrangement | 2-8-0 (Consolidation) |
| Gauge | 1,435 mm (Standard gauge) |
Dimensions and weights
| Property | Boston & Maine class K-8 saturated |
|---|---|
| Wheelbase | 7.93 m |
| Rigid wheelbase | 5.18 m |
| Total wheelbase | 17.98 m |
| Service weight | 93 t |
| Adhesive weight | 82.6 t |
| Total weight | 159.7 t |
| Water capacity | 26,498 l |
| Fuel capacity | 10.9 t (coal) |
Boiler
| Property | Boston & Maine class K-8 saturated |
|---|---|
| Grate area | 4.961 m² |
| Firebox surface | 18.952 m² |
| Tube heating surface | 274.715 m² |
| Evaporative heating surface | 293.667 m² |
| Total heating surface | 293.7 m² |
Power plant
| Property | Boston & Maine class K-8 saturated |
|---|---|
| Driver diameter | 1,549 mm |
| Boiler pressure | 13.8 bar |
| Expansion type | simple expansion |
| Cylinders | two, 559 x 762 mm |
Power
| Property | Boston & Maine class K-8 saturated |
|---|---|
| Power source | steam |
| Estimated power | 1,305 kW (1,774 PS) |
| Starting effort | 180.0 kN |
Calculated values
| Property | Boston & Maine class K-8 saturated |
|---|---|
| Factor of adhesion | 1 : 4.50 |
| Optimal speed | 45 km/h |
| Power-to-weight ratio | 14.0 kW/t |
| Heating Surface Equivalent | 388.4 m² |
| Cylinder volume/HSE | 1 : 962.23 |
| Adhesive weight/Total | 1 : 1.13 |
| Tractive force/Heating surface | 1 : 12.80 |
| Grate area/Heating surface | 1 : 59.20 |
| Firebox/Tube surface | 1 : 14.50 |
