Union Terminal 2-4-4 Locomotives of the USA

Class Details by Steve Llanso of Sweat House Media

Class 56 / A (Locobase 6827)

Data from KCS 12 - 1908 Locomotive Diagrams supplied in May 2005 by Allen Stanley from his extensive Raildata collection. See also DeGolyer, Volume 18, p. 199. Works number was 13430 in May 1893.

Bought for the Union Terminal in Kansas City, this little Forney entered service as a Vauclain compound with 10" HP and 17" LP cylinders and piston valves of 8" (203 mm) diameter. The data refer to a later rebuilding with simple-expansion cylinders and slide valves.

It later passed to the Kansas City Southern with the same number and finally was sold to Security Iron Company in March 1918.

Specifications by Steve Llanso of Sweat House Media
Class56 / A
Locobase ID6827
RailroadUnion Terminal (KCS)
Number in Class1
Road Numbers56
Number Built1
BuilderBurnham, Williams & Co
Valve GearStephenson
Locomotive Length and Weight
Driver Wheelbase (ft) 7.50
Engine Wheelbase (ft)29.79
Ratio of driving wheelbase to overall engine wheebase 0.25
Overall Wheelbase (engine & tender) (ft)29.79
Axle Loading (Maximum Weight per Axle) (lbs)
Weight on Drivers (lbs)58,000
Engine Weight (lbs)118,000
Tender Loaded Weight (lbs)
Total Engine and Tender Weight (lbs)118,000
Tender Water Capacity (gals)2000
Tender Fuel Capacity (oil/coal) (gals/tons)3
Minimum weight of rail (calculated) (lb/yd)48
Geometry Relating to Tractive Effort
Driver Diameter (in)57
Boiler Pressure (psi)155
High Pressure Cylinders (dia x stroke) (in)16" x 24"
Tractive Effort (lbs)14,201
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.08
Heating Ability
Firebox Area (sq ft)100
Grate Area (sq ft)16.30
Evaporative Heating Surface (sq ft)1029
Superheating Surface (sq ft)
Combined Heating Surface (sq ft)1029
Evaporative Heating Surface/Cylinder Volume184.24
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation2527
Same as above plus superheater percentage2527
Same as above but substitute firebox area for grate area15,500
Power L14031
Power MT306.44


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