Southern Utah 2-8-0 "Consolidation" Locomotives in the USA

Class Details by Steve Llanso of Sweat House Media

Class 104 (Locobase 12511)

Data from "Equipment and Supplies - Locomotive Building," Railway Age Gazette, Vol 48, #4 (28 January 1910), p 214. Works number was 47772 in April 1910.

In the same year that ten wide-firebox Consolidations were logged in Alco's order book for the Buffalo & Susquehanna as their 169-178, the line went into receivership. The orphans were distributed widely with the 177 going out to the Southern Utah.

Later renumbered as Utah Valley 4, the engine lasted until 1956.

Principal Dimensions by Steve Llanso of Sweat House Media
Locobase ID12,511
RailroadSouthern Utah
Number in Class1
Road Numbers104
Number Built1
Valve GearWalschaert
Locomotive Length and Weight
Driver Wheelbase (ft / m)14.25
Engine Wheelbase (ft / m)22.08
Ratio of driving wheelbase to overall engine wheebase 0.65
Overall Wheelbase (engine & tender) (ft / m)
Axle Loading (Maximum Weight per Axle) (lbs / kg)
Weight on Drivers (lbs / kg)167,000 / 75,750
Engine Weight (lbs / kg)185,000 / 83,915
Tender Loaded Weight (lbs / kg)
Total Engine and Tender Weight (lbs / kg)
Tender Water Capacity (gals / ML)6000 / 22.73
Tender Fuel Capacity (oil/coal) (gals/tons / ML/MT)12 / 10.90
Minimum weight of rail (calculated) (lb/yd / kg/m)70 / 35
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)51 / 1295
Boiler Pressure (psi / kPa)200 / 13.80
High Pressure Cylinders (dia x stroke) (in / mm)21" x 28" / 533x711
Tractive Effort (lbs / kg)41,160 / 18669.88
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.06
Heating Ability
Firebox Area (sq ft / m2)179 / 16.64
Grate Area (sq ft / m2)54.40 / 5.06
Evaporative Heating Surface (sq ft / m2)2676 / 248.70
Superheating Surface (sq ft / m2)
Combined Heating Surface (sq ft / m2)2676 / 248.70
Evaporative Heating Surface/Cylinder Volume238.40
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation10,880
Same as above plus superheater percentage10,880
Same as above but substitute firebox area for grate area35,800
Power L15408
Power MT285.57

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Wes Barris