Durham & Southern 2-10-0 "Decapod" Locomotives in 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.

Principal Dimensions by Steve Llanso of Sweat House Media
Locobase ID11,370
RailroadDurham & Southern
Number in Class3
Road Numbers200-202
Number Built3
Valve GearWalschaert
Locomotive Length and Weight
Driver Wheelbase (ft / m)19.67 / 6
Engine Wheelbase (ft / m)28.25 / 8.61
Ratio of driving wheelbase to overall engine wheebase 0.70
Overall Wheelbase (engine & tender) (ft / m)60.59 / 18.47
Axle Loading (Maximum Weight per Axle) (lbs / kg)38,000 / 17,237
Weight on Drivers (lbs / kg)190,000 / 86,183
Engine Weight (lbs / kg)212,000 / 96,162
Tender Loaded Weight (lbs / kg)141,500 / 64,183
Total Engine and Tender Weight (lbs / kg)353,500 / 160,345
Tender Water Capacity (gals / ML)7000 / 26.52
Tender Fuel Capacity (oil/coal) (gals/tons / ML/MT)12 / 10.90
Minimum weight of rail (calculated) (lb/yd / kg/m)63 / 31.50
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)56 / 1422
Boiler Pressure (psi / kPa)190 / 13.10
High Pressure Cylinders (dia x stroke) (in / mm)24" x 28" / 610x711
Tractive Effort (lbs / kg)46,512 / 21097.51
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.08
Heating Ability
Firebox Area (sq ft / m2)197 / 18.31
Grate Area (sq ft / m2)54.30 / 5.05
Evaporative Heating Surface (sq ft / m2)2343 / 217.75
Superheating Surface (sq ft / m2)553 / 51.39
Combined Heating Surface (sq ft / m2)2896 / 269.14
Evaporative Heating Surface/Cylinder Volume159.81
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation10,317
Same as above plus superheater percentage12,277
Same as above but substitute firebox area for grate area44,542
Power L110,046
Power MT582.83

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