D&RGW K-28
D&RGW 473
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| Type and origin | |
|---|---|
| References: | |
| Power type | Steam |
| Builder | American Locomotive Company (Alco) |
| Build date | 1923 |
| Total produced | 10 |
| Specifications | |
|---|---|
| Configuration: |
|
| • Whyte | 2-8-2 |
| • UIC | 1′D1′ h |
| Gauge | 3 ft (914 mm) |
| Driver dia. | 44 in (1,118 mm) |
| Adhesive weight | 113,500 lb (51.5 t) |
| Loco weight | As built:140,000 lb (63.5 t) Later:156,000 lb (70.8 t) |
| Tender weight | 98,500 lb (44.7 t) |
| Fuel type | Coal |
| Fuel capacity | 16,000 lb (7.3 t) |
| Water cap | 5,000 US gal (19,000 L) |
| Firebox: • Firegrate area |
30.17 sq ft (2.8 m2) |
| Boiler pressure | 200 lbf/in2 (1.38 MPa) |
| Heating surface: • Firebox |
102 sq ft (9.5 m2) |
| Superheater | Type A |
| Cylinders | Two, outside |
| Cylinder size | 18 in × 22 in (457 mm × 559 mm) |
| Valve gear | Walschaerts |
| Valve type | 11-inch (279 mm) piston valves |
| Loco brake | Straight air |
| Train brakes | No. 6 E-T |
| Performance figures | |
|---|---|
| Tractive effort | 27,540 lbf (123 kN) |
| Factor of adh. | 4.12 |
| Career | |
|---|---|
| Operators |
Denver and Rio Grande Denver and Rio Grande Western White Pass and Yukon Durango and Silverton |
| Class |
|
| Numbers | 470–479 |
| Nicknames | Sports Model |
| Locale | Colorado, New Mexico & Alaska |
| Preserved | 473, 476, 478 |
| Disposition | Three preserved on D&SNG; remainder scrapped after WW2 |
Denver & Rio Grande Western K-28 is a class of ten narrow gauge 2-8-2, Mikado type, steam railway locomotives, built as Passenger locomotives in 1923 by the Schenectady Locomotive Works of the American Locomotive Company for the Denver & Rio Grande Railroad. They were the first new narrow gauge locomotives ordered by the railroad since 1903. They initially comprised class E-4-148-S, but were reclassified K-28 in 1924 when the railroad reorganized into the Denver & Rio Grande Western Railroad.
The chassis is of outside-frame design with the drive wheels placed between the main frames, and the running gear (cranks, counterweights, rods and valve gear) to the outside. This general arrangement was also used on the earlier class K-27 and later class K-36 and K-37 engines.
In later years they were tasked with carrying express passengers on the narrow gauge such as the San Juan from Alamosa to Durango, The Silverton from Durango to Silverton, the Shavano from Salida to Gunnison, and on the Chili Line.
During World War II, seven of them were purchased by the US Army for use on the White Pass and Yukon Route in Alaska and the Yukon where they were renumbered USA 250 to USA 256. But they did not fare well in the bitter Yukon winters. In particular, the unusual, extended counterweights on the driving wheel axles made them liable to ride up on trackside ice, lifting the engine off the rails. All seven were withdrawn from service in 1944, and were barged to Seattle in 1946 for scrapping.
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Wikipedia