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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...
| Boston & Maine class K-8Remove | |
|---|---|
| Variant | superheated |
| Built | 1913-1916 |
| Manufacturers | Baldwin;ALCO |
| Wheel arrangement | 1D |
| Gauge | 1435 mm |
| Length | 20618 mm |
| Service mass | 95708 kg |
| Top speed | |
| Power | |
| Engine |
General
| Property | Boston & Maine class K-8superheated |
|---|---|
| Built | 1913-1916 |
| Manufacturers | Baldwin, ALCO |
| Wheel arrangement | 2-8-0 (Consolidation) |
| Gauge | 1,435 mm |
Dimensions and weights
| Property | Boston & Maine class K-8superheated |
|---|---|
| Length | 20.62 m |
| Wheelbase | 7.93 m |
| Total wheelbase | 17.70 m |
| Service mass | 95.7 t |
| Adhesion mass | 84.4 t |
| Total mass | 158.8 t |
| Rigid wheelbase | 5.18 m |
| Axle load | 23.8 t |
| Water capacity | 27,634 l |
| Fuel capacity | 10.9 t (coal) |
Boiler
| Property | Boston & Maine class K-8superheated |
|---|---|
| Grate area | 4.946 m² |
| Firebox surface | 19.231 m² |
| Tube heating surface | 202.993 m² |
| Evaporative heating surface | 222.224 m² |
| Superheater surface | 48.495 m² |
| Total heating surface | 270.7 m² |
Power plant
| Property | Boston & Maine class K-8superheated |
|---|---|
| Driver diameter | 1,549 mm |
| Boiler pressure | 12.4 bar |
| Expansion type | simple expansion |
| Cylinders | two, 610 x 762 mm |
Power
| Property | Boston & Maine class K-8superheated |
|---|---|
| Power source | steam |
| Estimated power | 1,342 kW (1,825 PS) |
| Starting effort | 192.8 kN |
Calculated values
| Property | Boston & Maine class K-8superheated |
|---|---|
| Factor of adhesion | 1 : 4.29 |
| Optimal speed | 42 km/h |
| Power-to-weight ratio | 14.0 kW/t |
| Heating Surface Equivalent | 415.4 m² |
| Cylinder volume/HSE | 1 : 1,070.86 |
| Adhesive weight/Total | 1 : 1.13 |
| Tractive force/Heating surface | 1 : 14.87 |
| Grate area/Heating surface | 1 : 54.73 |
| Firebox/Tube surface | 1 : 10.56 |
| Total/Superheater | 1 : 4.58 |
