Watertown & Sioux Falls / Great Northern 2-6-0 "Mogul" Type Locomotives

Class D-1 (Locobase 7460)

Data from GN 1916 Locomotive Diagrams book supplied in May 2005 by Allen Stanley from his extensive collection.

Possibly the first Moguls to go into service on the GN, these were relatively small and light engines.

Class D-2 (Locobase 7458)

Data from GN 1916 Locomotive Diagrams book supplied in May 2005 by Allen Stanley from his extensive collection.

Within a few years of completing the railway, the GN ordered a large batch of Moguls to work the freight. This numerous class had lost very few units by the time the 1916 diagram book was compiled. By 1929, however, the entire class seems to have been retired.

321 of the class was sold in January 1928 to Canada's Midland of Manitoba, where it was given number 1.

Class D-3 (Locobase 7459)

Data from GN 1916 Locomotive Diagrams book supplied in May 2005 by Allen Stanley from his extensive collection.

One of the Great Northern's smaller components was the W & SF. The profile shows an extended boiler tapering sharply toward the front just before the sand dome and stack. Unlike most GN engines, 13 had a radial-stay boiler.

Class D-4 (Locobase 2853)

Data from GN 1916 Locomotive Diagram book supplied in May 2005 by Allen Stanley from his extensive collection.

A low-slung Mogul with a Belpaire firebox displayed at 1893 Columbian Exposition. Although 351 was the number on the cab, that number belonged to an earlier Rogers class of D-2 Moguls of similar dimensions (342-359) that was supplied in 1891.

Class D-5 (Locobase 2615)

Data from 1899 Brooks Catalogue.

Builder info from B.Rumary, 25 Kingscombe, Gurney Slade, Radstock, BA3 4TH, ENGLAND and Jeremy Lambert as supplied by Allen Stanley in March 2004.

Works #2698-2709 in September 1896, 2788-2797 in August 1897. In addition 2798-2802 were delivered in the same month to the Eastern Railway of Minnesota with road #256-260.

Very close in size (heating surface area, tube length, number of tubes) to Brooks' delivery to the Buffalo, St. Mary, and SouthWestern RR. The grate area for the Belpaire firebox was even less, however.

In 1899, the whole class was renumbered 450-476 and the ERM's 5 became Great Northern when the railway was absorbed in 1902. Several were sold for scrap beginning in the late 1920s and ending in 1940, but three went to a Canadian railway. Two -- 460 & 458 -- had the same Midland Railway of Manitoba road number. Another -- 457 -- was number 5. This locomotive had earlier been converted to an 0-6-0 switcher (as were several others in the class) but was reunited with a leading truck before its sale to the Midland

Class D-6 (Locobase 7462)

Data from GN 1916 Locomotive Diagrams book supplied in May 2005 by Allen Stanley from his extensive collection.

This W & SF Mogul had fewer boiler tubes than did the earlier Schenectady engine, but somewhat taller drivers. All the 2-6-0s for this small component of the Great Northern were among the smallest of the type in US service.

Specifications
Class	D-1	D-2	D-3	D-4	D-5	D-6
Locobase ID	7460	7458	7459	2853	2615	7462
Railroad	Great Northern (GN)	Great Northern (GN)	Watertown & Sioux Falls (GN)	Great Northern (GN)	Great Northern (GN)	Watertown & Sioux Falls (GN)
Whyte	2-6-0	2-6-0	2-6-0	2-6-0	2-6-0	2-6-0
Road Numbers	477-480	300-359	13	400-426	371-92 / 450-476	12
Gauge	Std	Std	Std	Std	Std	Std
Builder	Burnham, Parry, Williams & Co	Rogers	Burnham, Williams & Co	Brooks	Brooks	Schenectady
Year	1889	1887	1901	1893	1896	1906
Valve Gear	Stephenson	Stephenson	Stephenson	Stephenson	Stephenson	Stephenson
	Locomotive Length and Weight
Driver Wheelbase	15.33'	15.08'	15.17'	14'	14'	14'
Engine Wheelbase	22.92'	22.75'	23.33'	21.50'	21.50'	21.08'
Ratio of driving wheelbase to overall engine wheebase	0.67	0.66	0.65	0.65	0.65	0.66
Overall Wheelbase (engine & tender)	43.50'	47'	45.33'	48.17'	48.33'	45.83'
Axle Loading (Maximum Weight per Axle)	25666 lbs	26060 lbs	35500 lbs			37933 lbs
Weight on Drivers	77000 lbs	78200 lbs	106500 lbs	108000 lbs	114000 lbs	113800 lbs
Engine Weight	90000 lbs	99800 lbs	119000 lbs	119900 lbs	130000 lbs
Tender Light Weight	72000 lbs	68000 lbs	80100 lbs	86000 lbs	85000 lbs	71500 lbs
Total Engine and Tender Weight	162000 lbs	167800 lbs	199100 lbs	205900 lbs	215000 lbs	0
Tender Water Capacity	3000 gals	3000 gals	4000 gals	4000 gals	4000 gals	3600 gals
Tender Fuel Capacity (oil/coal)	9 tons	5 tons	9 tons	8 tons	8.5 tons	5 tons
Minimum weight per yard of rail on which locomotive could run	42.78 lb rail	43.44 lb rail	59.17 lb rail	60 lb rail	63.33 lb rail	63.22 lb rail
	Geometry Relating to Tractive Effort
Driver Diameter	55"	55"	55"	55"	55"	55"
Boiler Pressure	145 psi	150 psi	180 psi	180 psi	180 psi	150 psi
Cylinders (dia x stroke)	18" x 24"	19" x 24"	18" x 24"	19" x 24"	19" x 26"	19" x 24"
Tractive Effort	17425 lbs	20085 lbs	21631 lbs	24102 lbs	26110 lbs	20085 lbs
Factor of Adhesion (Weight on Drivers/Tractive Effort)	4.42	3.89	4.92	4.48	4.37	5.67
	Heating Ability
Firebox Area	134.98 sq. ft	117.80 sq. ft	135 sq. ft	129.30 sq. ft	151 sq. ft	143 sq. ft
Grate Area	16.94 sq. ft	18.98 sq. ft	17.16 sq. ft	21.50 sq. ft	21.10 sq. ft	25.50 sq. ft
Evaporative Heating Surface	1310	1309	1502	1364	1601	1610
Superheating Surface
Combined Heating Surface	1310	1309	1502	1364	1601	1610
Evaporative Heating Surface/Cylinder Volume	185.33	166.21	212.49	173.19	187.64	204.42
	Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation	2456.30	2847	3088.80	3870	3798	3825
Same as above plus superheater percentage	2456.30	2847	3088.80	3870	3798	3825
Same as above but substitute firebox area for grate area	19572.10	17670	24300	23274	27180	21450
Power L1	3732.38	3313.63	5081.71	4212.05	4556.20	4059.11
Power MT	320.59	280.25	315.58	257.94	264.33	235.91