Green Bay & Western 2-6-0 "Mogul" Locomotives in the USA

Class Details by Steve Llanso of Sweat House Media

Class R (Locobase 14100)

Data from American Locomotive Company Light Locomotive Parts & General Products Catalog No. 10057, reproduced in the 8 October 2010 entry of . The 56 (works number 65975 in November 1924) was the last of the Class R Moguls and the third of three to come from Schenectady (the other two came from Pittsburgh). Given the 10-year history of this five-engine class, Locobase cannot say for certain that all of them had the same heating surface areas or other detail dimensions. Three of the five had engine weights of 139,000 lb (63,049 kg), while 52 and 56 are shown in the roster to weigh 141,000 lb (63,957 kg).

Locobase 1352 shows the Kewaunee, Green Bay & Western's Class R, a very similar design with somewhat greater amounts of heating surface area. It's quite likely that the 52-55 were also built to that design, but there were detail differences (53 was the only Green Bay Route engine to have an Alligator crosshead, for example.)

After the Moguls been in service for a while, GB&W upgraded some of them with piston valves operated by Walschaerts gear and superheaters. Seven even had Nicholson thermic syphons installed in their fireboxes from 1925-1929.

Principal Dimensions by Steve Llanso of Sweat House Media
Locobase ID14,100
RailroadGreen Bay & Western
Number in Class1
Road Numbers56
Number Built1
Valve GearWalschaert
Locomotive Length and Weight
Driver Wheelbase (ft / m)14 / 4.27
Engine Wheelbase (ft / m)21.83 / 6.65
Ratio of driving wheelbase to overall engine wheebase 0.64
Overall Wheelbase (engine & tender) (ft / m)52.37 / 15.96
Axle Loading (Maximum Weight per Axle) (lbs / kg)
Weight on Drivers (lbs / kg)125,000 / 56,699
Engine Weight (lbs / kg)142,500 / 64,637
Tender Loaded Weight (lbs / kg)113,000 / 51,256
Total Engine and Tender Weight (lbs / kg)255,500 / 115,893
Tender Water Capacity (gals / ML)5000 / 18.94
Tender Fuel Capacity (oil/coal) (gals/tons / ML/MT)12 / 10.90
Minimum weight of rail (calculated) (lb/yd / kg/m)69 / 34.50
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)56 / 1422
Boiler Pressure (psi / kPa)180 / 12.40
High Pressure Cylinders (dia x stroke) (in / mm)19" x 26" / 483x660
Tractive Effort (lbs / kg)25,644 / 11631.94
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.87
Heating Ability
Firebox Area (sq ft / m2)174 / 16.16
Grate Area (sq ft / m2)30.20 / 2.81
Evaporative Heating Surface (sq ft / m2)1116 / 103.68
Superheating Surface (sq ft / m2)233 / 21.65
Combined Heating Surface (sq ft / m2)1349 / 125.33
Evaporative Heating Surface/Cylinder Volume130.80
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation5436
Same as above plus superheater percentage6360
Same as above but substitute firebox area for grate area36,644
Power L18040
Power MT425.40

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Wes Barris