Although positioned squarely in the middle of Consolidation size and power for the first few years of the 20th Century and seemingly well-suited to the drag-freight duties performed by most Clinchfield locomotives, this pair of Consolidations was converted in 1917 to 0-8-0 switchers. So altered, they operated on the Clinch until their scrapping in September 1938.
33156-33158 in January 1909 and 33181, 33187-33188 in February.
The Clinchfield favored larger freight locomotives and had a disproportionate number of articulateds to handle the long coal drags that were the railroad's mainstay business. There were shorter, lighter freights to handle, though, and the Clinch bought this batch of Consolidations as its largest single purchase ever soon after the railroad opened under the CC & O banner. Equipped with a sizable boiler and firebox (the latter with 28 sq ft of arch tubes), medium-sized drivers for a 2-8-0, and 12" piston valves, the class remained essentially unchanged throughout its career.
Two were sold -- 314 in October 1937 to Sloss Sheffield Steel Company as their #28, and 309 in May 1941 to American Rolling Mill Company. The others were scrapped in July 1951 (312), December 1951 (300-303, 307-308, 310-311, 313), and September 1953 (304-306)).
|Specifications by Steve Llanso of Sweat House Media|
|Class||51 / H-3||H-4|
|Railroad||South & Western (Clinchfield)||Carolina, Clinchfield & Ohio (Clinchfield)|
|Number in Class||2||15|
|Locomotive Length and Weight|
|Ratio of driving wheelbase to overall engine wheebase||0.62||0.65|
|Overall Wheelbase (engine & tender)||59.62'|
|Axle Loading (Maximum Weight per Axle)||50950 lbs|
|Weight on Drivers||163000 lbs||178680 lbs|
|Engine Weight||178000 lbs||199150 lbs|
|Tender Light Weight||120000 lbs||150000 lbs|
|Total Engine and Tender Weight||298000 lbs||349150 lbs|
|Tender Water Capacity||6000 gals||7500 gals|
|Tender Fuel Capacity (oil/coal)||15 tons|
|Minimum weight of rail (calculated)||68 lb/yard||74 lb/yard|
|Geometry Relating to Tractive Effort|
|Boiler Pressure||200 psi||190 psi|
|Cylinders (dia x stroke)||21" x 28"||22" x 32"|
|Tractive Effort||41160 lbs||43883 lbs|
|Factor of Adhesion (Weight on Drivers/Tractive Effort)||3.96||4.07|
|Firebox Area||200 sq. ft||220 sq. ft|
|Grate Area||37 sq. ft||54 sq. ft|
|Evaporative Heating Surface||2630 sq. ft||3482 sq. ft|
|Combined Heating Surface||2630 sq. ft||3482 sq. ft|
|Evaporative Heating Surface/Cylinder Volume||234.31||247.32|
|Computations Relating to Power Output (More Information)|
|Robert LeMassena's Power Computation||7400||10260|
|Same as above plus superheater percentage||7400||10260|
|Same as above but substitute firebox area for grate area||40000||41800|