Durham & Southern 2-10-0 "Decapod" Locomotives of the USA

Class Details by Steve Llanso of Sweat House Media

Class 200 (Locobase 11370)

Data from Baldwin data cards for two orders for Class 12-42-F, 20. See also DeGolyer, Vol 77, pp. 600+. Works numbers were 61350-61351 in May 1930 and 61749 in September 1933.

Exactly duplicating the Baldwin light Decapods (see, e.g., Locobases 1396-1397) that had gone into service in several southern roads during the 1920s, these were the first D & S locomotives that were ordered directly by that road. (One other note: the 202 was the only steam engine Baldwin delivered to a North American customer in 1933.)

Firebox heating surface included 25 sq ft (2.3 sq m) in four arch tubes. Piston valves measured 12" (306 mm) in diameter.

The D & S was a North Carolina shortline that began life as the Cape Fear & Northern in 1892, but was built between Durham and Dunn (in an arc west of Raleigh) in 1903.

The new-built trio never operated elsewhere for the 21-24 years that they remained in service. They were joined by a sister deck in the form of ex-Alabama, Tennessee & Northern 403 in 1947 and all were retired in 1954.

Specifications by Steve Llanso of Sweat House Media
Locobase ID11370
RailroadDurham & Southern
Number in Class3
Road Numbers200-202
Number Built3
Valve GearWalschaert
Locomotive Length and Weight
Driver Wheelbase19.67'
Engine Wheelbase28.25'
Ratio of driving wheelbase to overall engine wheebase 0.70
Overall Wheelbase (engine & tender)60.59'
Axle Loading (Maximum Weight per Axle)38000 lbs
Weight on Drivers190000 lbs
Engine Weight212000 lbs
Tender Light Weight141500 lbs
Total Engine and Tender Weight353500 lbs
Tender Water Capacity7000 gals
Tender Fuel Capacity (oil/coal)12 tons
Minimum weight of rail (calculated)63 lb/yard
Geometry Relating to Tractive Effort
Driver Diameter56"
Boiler Pressure190 psi
Cylinders (dia x stroke)24" x 28"
Tractive Effort46512 lbs
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.08
Heating Ability
Firebox Area197 sq. ft
Grate Area54.30 sq. ft
Evaporative Heating Surface2343 sq. ft
Superheating Surface553 sq. ft
Combined Heating Surface2896 sq. ft
Evaporative Heating Surface/Cylinder Volume159.81
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation10317
Same as above plus superheater percentage12277
Same as above but substitute firebox area for grate area44542
Power L110046
Power MT582.83


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