Cornwall 2-8-0 "Consolidation" Locomotives in the USA

Class Details by Steve Llanso of Sweat House Media

Class 15 (Locobase 15328)

Data from Mark Cain's [], supplemented by DeGolyer, Vol 74, pp. 14+. Works number was 58468 in June 1925.

This superheated Consolidation provided a considerable amount of power for this 12-mile-long iron-ore railroad. Its design was a duplicate of a coal Consolidation produced for the Unity Railways (about 30 miles closer to Pittsburgh) and described in Locobase 15329. The 15's hot steam was conveyed to its cylinders through 12" (305 mm) piston valves. In a nod to one of its principal customers, the Cornwall specified Bethlehem "material" was to be used in the "plates, bars, bolts, rivets, boiler tubes, wheels, axles, and any other material of Bethlehem production wherever possible."

The 15, which shared a lot of detail components with the 14 (a 4-4-0 delivered a year earlier and described in Locobase 11795) was obviously a good fit as it remained in service for the rest of the CRR's years of steam. When the CRR turned to diesel power in 1950, the 15 was retired and later scrapped in 1951.

Principal Dimensions by Steve Llanso of Sweat House Media

Locobase ID15328
Number in Class1
Road Numbers15
Number Built1
Valve GearWalschaert
Locomotive Length and Weight
Driver Wheelbase (ft / m)14.50 / 4.42
Engine Wheelbase (ft / m)23.83 / 7.26
Ratio of driving wheelbase to overall engine wheelbase 0.61
Overall Wheelbase (engine & tender) (ft / m)56.21 / 17.13
Axle Loading (Maximum Weight per Axle) (lbs / kg)
Weight on Drivers (lbs / kg)200,000 / 90,719
Engine Weight (lbs / kg)218,000 / 98,883
Tender Loaded Weight (lbs / kg)126,000 / 57,153
Total Engine and Tender Weight (lbs / kg)344,000 / 156,036
Tender Water Capacity (gals / ML)6000 / 22.73
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT)10 / 9
Minimum weight of rail (calculated) (lb/yd / kg/m)83 / 41.50
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)23" x 28" / 584x711
Tractive Effort (lbs / kg)49,373 / 22395.24
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.05
Heating Ability
Tubes (number - dia) (in / mm)223 - 2" / 51
Flues (number - dia) (in / mm)38 - 5.375" / 137
Flue/Tube length (ft / m)14.42 / 4.40
Firebox Area (sq ft / m2)222 / 20.62
Grate Area (sq ft / m2)49.75 / 4.62
Evaporative Heating Surface (sq ft / m2)2662 / 247.31
Superheating Surface (sq ft / m2)608 / 56.48
Combined Heating Surface (sq ft / m2)3270 / 303.79
Evaporative Heating Surface/Cylinder Volume197.77
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation9950
Same as above plus superheater percentage11,841
Same as above but substitute firebox area for grate area52,836
Power L111,675
Power MT514.78

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Wes Barris