Southern Utah 2-8-0 "Consolidation" Locomotives of 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.

Specifications by Steve Llanso of Sweat House Media
Locobase ID12511
RailroadSouthern Utah
Number in Class1
Road Numbers104
Number Built1
Valve GearWalschaert
Locomotive Length and Weight
Driver Wheelbase14.25'
Engine Wheelbase22.08'
Ratio of driving wheelbase to overall engine wheebase 0.65
Overall Wheelbase (engine & tender)
Axle Loading (Maximum Weight per Axle)
Weight on Drivers167000 lbs
Engine Weight185000 lbs
Tender Light Weight
Total Engine and Tender Weight
Tender Water Capacity6000 gals
Tender Fuel Capacity (oil/coal)12 tons
Minimum weight of rail (calculated)70 lb/yard
Geometry Relating to Tractive Effort
Driver Diameter51"
Boiler Pressure200 psi
Cylinders (dia x stroke)21" x 28"
Tractive Effort41160 lbs
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.06
Heating Ability
Firebox Area179 sq. ft
Grate Area54.40 sq. ft
Evaporative Heating Surface2676 sq. ft
Superheating Surface
Combined Heating Surface2676 sq. ft
Evaporative Heating Surface/Cylinder Volume238.40
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation10880
Same as above plus superheater percentage10880
Same as above but substitute firebox area for grate area35800
Power L15408
Power MT285.57

If you have any railroad data such as diagram books, rail station plans or anything else that you would be willing to share, please contact us.