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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...
| Denver & Rio Grande Western class K-27Remove | |
|---|---|
| Variant | superheated |
| Built | 1924 |
| Manufacturers | D&RGW |
| Wheel arrangement | 1D1 |
| Gauge | 914 mm |
| Length | |
| Service mass | 63616 kg |
| Top speed | |
| Power | |
| Engine |
General
| Property | Denver & Rio Grande Western class K-27superheated |
|---|---|
| Built | 1924 |
| Manufacturers | D&RGW |
| Wheel arrangement | 2-8-2 (Mikado) |
| Gauge | 914 mm |
Dimensions and weights
| Property | Denver & Rio Grande Western class K-27superheated |
|---|---|
| Wheelbase | 7.47 m |
| Total wheelbase | 15.56 m |
| Service mass | 63.6 t |
| Adhesion mass | 49.1 t |
| Total mass | 101.4 t |
| Rigid wheelbase | 3.48 m |
| Axle load | 12.7 t |
| Water capacity | 15,520 l |
| Fuel capacity | 7.7 t (coal) |
Boiler
| Property | Denver & Rio Grande Western class K-27superheated |
|---|---|
| Grate area | 2.803 m² |
| Firebox surface | 10.498 m² |
| Tube heating surface | 131.272 m² |
| Evaporative heating surface | 141.77 m² |
| Superheater surface | 37.812 m² |
| Total heating surface | 179.6 m² |
Power plant
| Property | Denver & Rio Grande Western class K-27superheated |
|---|---|
| Driver diameter | 1,016 mm |
| Boiler pressure | 13.8 bar |
| Expansion type | simple expansion |
| Cylinders | two, 432 x 559 mm |
Power
| Property | Denver & Rio Grande Western class K-27superheated |
|---|---|
| Power source | steam |
| Estimated power | 820 kW (1,115 PS) |
| Starting effort | 120.2 kN |
Calculated values
| Property | Denver & Rio Grande Western class K-27superheated |
|---|---|
| Factor of adhesion | 1 : 4.01 |
| Optimal speed | 42 km/h |
| Power-to-weight ratio | 12.9 kW/t |
| Heating Surface Equivalent | 269.9 m² |
| Cylinder volume/HSE | 1 : 606.41 |
| Adhesive weight/Total | 1 : 1.30 |
| Tractive force/Heating surface | 1 : 13.98 |
| Grate area/Heating surface | 1 : 64.07 |
| Firebox/Tube surface | 1 : 12.50 |
| Total/Superheater | 1 : 3.75 |
