Dover & South Bound 0-4-2 Locomotives of the USA

Class Details by Steve Llanso of Sweat House Media

Class 7 (Locobase 12968)

Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University Volume 29, p. 68. Works number was 27950 in April 1906.

This wood-burning engine trailed a tender behind it and was the little brother of the Mogul that preceded it (Locobase 12740).

Specifications by Steve Llanso of Sweat House Media
Locobase ID12,968
RailroadDover & South Bound
Number in Class1
Road Numbers7
Number Built1
BuilderBurnham, Williams & Co
Valve GearStephenson
Locomotive Length and Weight
Driver Wheelbase (ft)5
Engine Wheelbase (ft)10
Ratio of driving wheelbase to overall engine wheebase 0.50
Overall Wheelbase (engine & tender) (ft)10
Axle Loading (Maximum Weight per Axle) (lbs)
Weight on Drivers (lbs)21,000
Engine Weight (lbs)24,000
Tender Loaded Weight (lbs)20,000
Total Engine and Tender Weight (lbs)44,000
Tender Water Capacity (gals)1500
Tender Fuel Capacity (oil/coal) (gals/tons)
Minimum weight of rail (calculated) (lb/yd)18
Geometry Relating to Tractive Effort
Driver Diameter (in)33
Boiler Pressure (psi)160
High Pressure Cylinders (dia x stroke) (in)9" x 14"
Tractive Effort (lbs)4673
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.49
Heating Ability
Firebox Area (sq ft)33.50
Grate Area (sq ft) 8.20
Evaporative Heating Surface (sq ft)239
Superheating Surface (sq ft)
Combined Heating Surface (sq ft)239
Evaporative Heating Surface/Cylinder Volume231.85
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation1312
Same as above plus superheater percentage1312
Same as above but substitute firebox area for grate area5360
Power L13470
Power MT728.57

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