The four-coupled double-ender wheel arrangement was only rarely seen in any form, still less when pulling a separate tender. The most enthusiastic standard-gauge operator was the Paris-Lyons-Mediterranee, which bought several classes of 2-4-2 express engines in the late 1800s.
Every so often, however, Baldwin would sell such an engine (albeit of much smaller proportions) to short lines or logging roads. The specs show that both trucks enjoyed 4 inches of lateral play to each side to allow the engine snake around sharp curves. Four axles spread the weight out over the 30 lb/yard (15 kg/metre) rail and the modest 0.5% grade offered little challenge. A more usual choice was the 2-6-0 Mogul for its tractive power, but Scott Lumber may have wanted better bidirectional tracking.
Scott Lumber was based in Ayers, SC. The 15 moved on to Central Timber Saw Mills, then Chapman Storm, Holly Hill Lumber. The latter stored the engine in 1957. In 1968, Six-Gun Territory, a theme park in Ocala, Fla, bought the 15 for its tourist road.
The engine was last reported to be under restoration at Savannah, Georgia's, Roundhouse Railroad Museum.
|Specifications by Steve Llanso of Sweat House Media|
|Number in Class||1|
|Locomotive Length and Weight|
|Ratio of driving wheelbase to overall engine wheebase||0.31|
|Overall Wheelbase (engine & tender)||38.08'|
|Axle Loading (Maximum Weight per Axle)|
|Weight on Drivers||34000 lbs|
|Engine Weight||52000 lbs|
|Tender Light Weight||41000 lbs|
|Total Engine and Tender Weight||93000 lbs|
|Tender Water Capacity||1800 gals|
|Tender Fuel Capacity (oil/coal)||3 tons|
|Minimum weight of rail (calculated)||28 lb/yard|
|Geometry Relating to Tractive Effort|
|Boiler Pressure||160 psi|
|Cylinders (dia x stroke)||12" x 18"|
|Tractive Effort||8393 lbs|
|Factor of Adhesion (Weight on Drivers/Tractive Effort)||4.05|
|Firebox Area||46 sq. ft|
|Grate Area||10.20 sq. ft|
|Evaporative Heating Surface||509 sq. ft|
|Combined Heating Surface||509 sq. ft|
|Evaporative Heating Surface/Cylinder Volume||216.03|
|Computations Relating to Power Output (More Information)|
|Robert LeMassena's Power Computation||1632|
|Same as above plus superheater percentage||1632|
|Same as above but substitute firebox area for grate area||7360|