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Boston & Maine classes K-5a and K-5b
Parallel to the K-6 with a two-cylinder compound engine, the Boston & Maine had ALCO in Schenectady build 34 class K-5a and b locomotives with a simple engine. They still had Stephenson valve gear but piston valves. A...
General
| Property | Boston & Maine classes K-5a and K-5bRemove |
|---|---|
| Built | 1901 |
| Manufacturers | ALCO |
| Wheel arrangement | 2-8-0 (Consolidation) |
| Gauge | 1,435 mm (Standard gauge) |
Dimensions and weights
| Property | Boston & Maine classes K-5a and K-5bRemove |
|---|---|
| Wheelbase | 7.77 m |
| Rigid wheelbase | 5.18 m |
| Total wheelbase | 16.41 m |
| Service weight | 73.5 t |
| Adhesive weight | 64.4 t |
| Axle load | 16.1 t |
| Water capacity | 18,927 l |
| Fuel capacity | 9.1 t (coal) |
Boiler
| Property | Boston & Maine classes K-5a and K-5bRemove |
|---|---|
| Grate area | 4.321 m² |
| Firebox surface | 14.586 m² |
| Tube heating surface | 252.511 m² |
| Evaporative heating surface | 267.096 m² |
| Total heating surface | 267.1 m² |
Power plant
| Property | Boston & Maine classes K-5a and K-5bRemove |
|---|---|
| Driver diameter | 1,549 mm |
| Boiler pressure | 13.8 bar |
| Expansion type | simple expansion |
| Cylinders | two, 508 x 762 mm |
Power
| Property | Boston & Maine classes K-5a and K-5bRemove |
|---|---|
| Power source | steam |
| Estimated power | 1,119 kW (1,521 PS) |
| Starting effort | 148.8 kN |
Calculated values
| Property | Boston & Maine classes K-5a and K-5bRemove |
|---|---|
| Factor of adhesion | 1 : 4.25 |
| Optimal speed | 47 km/h |
| Power-to-weight ratio | 15.2 kW/t |
| Heating Surface Equivalent | 340.0 m² |
| Cylinder volume/HSE | 1 : 908.42 |
| Adhesive weight/Total | 1 : 1.14 |
| Tractive force/Heating surface | 1 : 11.63 |
| Grate area/Heating surface | 1 : 61.81 |
| Firebox/Tube surface | 1 : 17.31 |
