Colorado & Southern 2-6-0 "Mogul" Locomotives in the USA

Class Details by Steve Llanso of Sweat House Media

Class 17 (Locobase 7682)

Data from C & S 9-1941 Locomotive Diagrams supplied in May 2005 by Allen Stanley from his extensive Rail Data Exchange. Works numbers were 713-714 in May 1882, 727-728 in June, 742-743 in July, 755-756 in August, and 782-783 in September.

The Denver, South Park & Pacific was chartered in 1873 and ran a narrow-gauge line to Leadville and Gunnison by 1888. Brooks Locomotive Works sold ten Moguls to the railroad in 1882. After foreclosure, twelve of the narrow-gauge lines in Colorado were reorganized as the Union Pacific, Denver & Gulf in 1890.

When the Colorado & Southern was created in 1898 to take over the UP, D&G assets, it renumbered six of the ten as 17-22. According to a post to the Narrow Gauge Railroad Discussion Form by "myork" on 25 May 2010 (last accessed at [] on 23 November 2011):

"C&S #21 and #22 were Brooks moguls in name only. In the 1890s, they were re-built with new straight boilers, new frames, new drivers, new cabs, new domes, new stacks, new cylinders (note that #21 and #22 don't say "Brooks" on the cylinder casting after the rebuilds), Items such as the bell and whistle might have been original."

York goes on to describe the C & S's Mogul holdings at the time of the railroad's formation:

"[T]hey had several of the 38" drivered, wagon top boilered Brooks moguls on the roster. They had #21 and #22 which had been rebuilt to match the specs of the straight boilered Cooke moguls, and they had the Cooke moguls. Then, within the first few years, they re-boilered #4-10 with wagon top boilers. In the late teens, #4-10 received new frames as well ...frames with the same driver spacing as the long since sold/scrapped/rebuilt Brooks moguls ....but these Cooke moguls retained their 40" drivers."

John Crandall's roster on records that 21 was scrapped in August 1923 while 22 went to the ferro-knacker in March 1927.

Principal Dimensions by Steve Llanso of Sweat House Media
Locobase ID7682
RailroadColorado & Southern (C&S)
Number in Class6
Road Numbers17-22
Number Built6
Valve GearStephenson
Locomotive Length and Weight
Driver Wheelbase (ft / m) 9.50 / 2.90
Engine Wheelbase (ft / m)15.58 / 4.75
Ratio of driving wheelbase to overall engine wheebase 0.61
Overall Wheelbase (engine & tender) (ft / m)46.92 / 14.30
Axle Loading (Maximum Weight per Axle) (lbs / kg)18,700 / 8482
Weight on Drivers (lbs / kg)55,000 / 24,948
Engine Weight (lbs / kg)63,250 / 28,690
Tender Loaded Weight (lbs / kg)47,166 / 21,394
Total Engine and Tender Weight (lbs / kg)110,416 / 50,084
Tender Water Capacity (gals / ML)2000 / 7.58
Tender Fuel Capacity (oil/coal) (gals/tons / ML/MT)5 / 4.50
Minimum weight of rail (calculated) (lb/yd / kg/m)31 / 15.50
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)40 / 1016
Boiler Pressure (psi / kPa)160 / 11
High Pressure Cylinders (dia x stroke) (in / mm)15" x 18" / 381x457
Tractive Effort (lbs / kg)13,770 / 6245.97
Factor of Adhesion (Weight on Drivers/Tractive Effort) 3.99
Heating Ability
Firebox Area (sq ft / m2)85.20 / 7.92
Grate Area (sq ft / m2)13.10 / 1.22
Evaporative Heating Surface (sq ft / m2)757 / 70.35
Superheating Surface (sq ft / m2)
Combined Heating Surface (sq ft / m2)757 / 70.35
Evaporative Heating Surface/Cylinder Volume205.62
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation2096
Same as above plus superheater percentage2096
Same as above but substitute firebox area for grate area13,632
Power L13428
Power MT412.22

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Wes Barris