D&RGW K-28

Denver & Rio Grande Western K-28 Class
D&RGW 473
Power type	Steam
References:[1][2][3]
Builder	American Locomotive Company (Alco)
Build date	1923
Configuration	2-8-2
UIC classification	1′D1′ h
Gauge	3 ft  (914 mm)
Driver diameter	44 in (1,118 mm)
Weight on drivers	113,500 lb (51.5 t)
Locomotive weight	As built:140,000 lb (63.5 t)[1] 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 capacity	5,000 US gal (19,000 L)
Boiler pressure	200 lbf/in² (1.38 MPa)
Firegrate area	30.17 sq ft (2.8 m2)
Heating surface: Firebox	102 sq ft (9.5 m2)
Superheater type	Type A
Cylinders	Two, outside
Cylinder size	18 × 22 in (457 × 559 mm)
Valve gear	Walschaerts
Valve type	11-inch (279 mm) piston valves
Tractive effort	27,540 lbf (123 kN)
Factor of adhesion	4.12
Locomotive brakes	Straight air
Train brakes	No. 6 E-T
Career	Denver and Rio Grande Denver and Rio Grande Western White Pass and Yukon Durango and Silverton
Class	D&RG: 140 D&RGW: K-28
Number in class	10
Number	470–479
Nicknames	Sports Model
Locale	Colorado, New Mexico & Alaska
Disposition	D&SNG:473, 476, 478 Others 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 freight 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.^[1] They initially comprised class 190, but were reclassed K-28 in 1924 when the railroad reorganized into the Denver & Rio Grande Western Railroad.^[3]

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 and the Shavano from Salida to Gunnison.

White Pass & Yukon

During World War II, seven of them were taken by the US Army for use on the White Pass and Yukon Route in Alaska and the Yukon. The locomotives which went there were renumbered USA 250–256, worked hard and then scrapped in Seattle after the war. The Durango & Silverton inherited the other three when it took over the Silverton Branch in 1981.^[2] Number 473 is operational while 476 is in the Museum at Durango awaiting major repairs, with 478 currently being rebuilt.

The K-28s today

Due to their smaller size, these engines are often used on the Durango & Silverton for shorter trains, usually the first or last on the schedule, and often for helper service or sectioned trains. Despite being smaller than the K-36 class locomotives, a little older and less powerful, the engine crews tend to favor a trip on these engines because the design ALCO used was superior in balance and servicing. Firing can be tricky when the engine is working hard, as the clamshell style firedoors tend to pull into the backhead of the boiler due to the draft, and if any flues in the boiler are leaking, the loss of draft on the fire is much harder to work around than on the K-36 locomotives. Firing while the engine is working hard is done with a large "heel" pattern, generally with as little coal on the flue sheet as possible, and gradually sloping the fire bed towards the door sheet to the height or higher than the firedoors. This results in the draft being forced through the fire bed in the thinner areas towards the flue sheet, which usually is hindered by the lack of draft between the grates and the arch brick. New firemen sometimes have a hard time learning this because there are fewer training hours available on the K-28 class locomotives compared to the railroad's usual K-36 workhorses which have a larger firebox and are more forgiving of poor technique.

Roster^[3]

D&RGW Number	Builder's Number	Disposition	WP&Y number
470	64981	WP&Y, then scrapped	250
471	64982	WP&Y, then scrapped	251
472	64983	WP&Y, then scrapped	252
473	64984	D&SNG, operational
474	64985	WP&Y, then scrapped	253
475	64986	WP&Y, then scrapped	254
476	64987	D&SNG, museum, awaiting major repair
477	64988	WP&Y, then scrapped	255
478	64989	D&SNG, Currently undergoing rebuild inside Durango roundhouse
479	64990	WP&Y, then scrapped	256

References

1. ^ ^{a b c} Official Roster No. 11 of the Denver and Rio Grande Western Railroad System. Denver: The Denver and Rio Grande Western Railroad System. April 1, 1923. 
2. ^ ^{a b} "Denver & Rio Grande Western Mikados". Steam Locomotive dot com. http://www.steamlocomotive.com/mikado/drgw.shtml. Retrieved 12 February 2010. 
3. ^ ^{a b c} "Denver & Rio Grande Western Roster". Rio Grande Modeling & Historical Society. http://www.drgw.org/data/steam/roster/drgw04.htm. Retrieved 12 February 2010.