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Denver & Rio Grande Western class L-105
One of two classes of 4-6-6-4 “Challenger” locomotives ordered by the DRGW was the L-105 introduced in 1938. It was designed for mixed service on grades in the Rocky Mountains with up to three percent and sharp curves...
General
| Property | Denver & Rio Grande Western class L-105 Remove |
|---|---|
| Built | 1941 |
| Manufacturers | Baldwin |
| Wheel arrangement | 4-6-6-4 (Challenger) |
| Gauge | 1,435 mm (Standard gauge) |
Dimensions and weights
| Property | Denver & Rio Grande Western class L-105 Remove |
|---|---|
| Wheelbase | 18.75 m |
| Rigid wheelbase | 3.71 m |
| Total wheelbase | 32.92 m |
| Service weight | 291.1 t |
| Adhesive weight | 197.5 t |
| Axle load | 33.9 t |
| Total weight | 469.6 t |
| Water capacity | 75,708 l |
| Fuel capacity | 24.5 t (coal) |
Boiler
| Property | Denver & Rio Grande Western class L-105 Remove |
|---|---|
| Grate area | 12.681 m² |
| Firebox surface | 74.88 m² |
| Tube heating surface | 457.455 m² |
| Evaporative heating surface | 532.335 m² |
| Superheater surface | 234.58 m² |
| Total heating surface | 766.9 m² |
Power plant
| Property | Denver & Rio Grande Western class L-105 Remove |
|---|---|
| Driver diameter | 1,778 mm |
| Boiler pressure | 17.6 bar |
| Expansion type | simple expansion |
| Cylinders | four, 584 x 813 mm |
Power
| Property | Denver & Rio Grande Western class L-105 Remove |
|---|---|
| Power source | steam |
| Estimated power | 4,772 kW (6,488 PS) |
| Starting effort | 466.3 kN |
Calculated values
| Property | Denver & Rio Grande Western class L-105 Remove |
|---|---|
| Factor of adhesion | 1 : 4.16 |
| Optimal speed | 63 km/h |
| Power-to-weight ratio | 16.4 kW/t |
| Heating Surface Equivalent | 1,375.9 m² |
| Cylinder volume/HSE | 1 : 633.39 |
| Adhesive weight/Total | 1 : 1.47 |
| Tractive force/Heating surface | 1 : 12.70 |
| Grate area/Heating surface | 1 : 60.48 |
| Firebox/Tube surface | 1 : 6.11 |
| Total/Superheater | 1 : 2.27 |
