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Denver & Rio Grande Western class K-27
The K-27 class was the last compound locomotive built for the D&RGW. The “K” stood for “Mikado” and the number for starting tractive effort of 27,000 pounds . They had four compound cylinders and was of the Vauclain t...
General
| Property | Denver & Rio Grande Western class K-27 as built |
|---|---|
| Built | 1903 |
| Manufacturers | Baldwin |
| Wheel arrangement | 2-8-2 (Mikado) |
| Gauge | 914 mm (Three feet) |
Dimensions and weights
| Property | Denver & Rio Grande Western class K-27 as built |
|---|---|
| Wheelbase | 7.47 m |
| Rigid wheelbase | 3.48 m |
| Total wheelbase | 15.56 m |
| Service weight | 56.9 t |
| Adhesive weight | 45.4 t |
| Axle load | 11.9 t |
| Total weight | 89.6 t |
| Water capacity | 13,249 l |
| Fuel capacity | 7.7 t (coal) |
Boiler
| Property | Denver & Rio Grande Western class K-27 as built |
|---|---|
| Grate area | 2.806 m² |
| Firebox surface | 9.848 m² |
| Tube heating surface | 188.315 m² |
| Evaporative heating surface | 198.162 m² |
| Total heating surface | 198.2 m² |
Power plant
| Property | Denver & Rio Grande Western class K-27 as built |
|---|---|
| Driver diameter | 1,016 mm |
| Boiler pressure | 13.8 bar |
| Expansion type | compound |
| Cylinders | four, HP: 330 x 559 mm and LP: 559 x 559 mm |
Power
| Property | Denver & Rio Grande Western class K-27 as built |
|---|---|
| Power source | steam |
| Estimated power | 671 kW (912 PS) |
| Starting effort | 104.2 kN |
| Starting effort simple | 125.0 kN |
Calculated values
| Property | Denver & Rio Grande Western class K-27 as built |
|---|---|
| Factor of adhesion | 1 : 4.27 |
| Optimal speed | 39 km/h |
| Power-to-weight ratio | 11.8 kW/t |
| Heating Surface Equivalent | 247.4 m² |
| Cylinder volume/HSE | 1 : 940.76 |
| Adhesive weight/Total | 1 : 1.26 |
| Tractive force/Heating surface | 1 : 10.98 |
| Grate area/Heating surface | 1 : 70.62 |
| Firebox/Tube surface | 1 : 19.12 |
