New Haven & Dunbar 0-4-2 Locomotives of the USA

Class Details by Steve Llanso of Sweat House Media

Class 15 (Locobase 12600)

Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University Volume 24, p. 192. Works number was 20122 in February 1902.

For a 7-mile short line in the coal-mining region of western Pennsylvania, this was a relatively large tank engine of its arrangement. The locomotive had sand domes flanking the steam dome, thus ensuring liberal amounts of traction enhancement as needed.

The railroad was open from 1892 to 1955.

Specifications by Steve Llanso of Sweat House Media
Locobase ID12600
RailroadNew Haven & Dunbar
Number in Class1
Road Numbers15
Number Built1
BuilderBurnham, Williams & Co
Valve GearStephenson
Locomotive Length and Weight
Driver Wheelbase7'
Engine Wheelbase17.50'
Ratio of driving wheelbase to overall engine wheebase 0.40
Overall Wheelbase (engine & tender)17.50'
Axle Loading (Maximum Weight per Axle)
Weight on Drivers90000 lbs
Engine Weight100000 lbs
Tender Light Weight
Total Engine and Tender Weight100000 lbs
Tender Water Capacity1000 gals
Tender Fuel Capacity (oil/coal)
Minimum weight of rail (calculated)75 lb/yard
Geometry Relating to Tractive Effort
Driver Diameter50"
Boiler Pressure160 psi
Cylinders (dia x stroke)17" x 24"
Tractive Effort18866 lbs
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.77
Heating Ability
Firebox Area88.60 sq. ft
Grate Area13.90 sq. ft
Evaporative Heating Surface1146 sq. ft
Superheating Surface
Combined Heating Surface1146 sq. ft
Evaporative Heating Surface/Cylinder Volume181.76
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation2224
Same as above plus superheater percentage2224
Same as above but substitute firebox area for grate area14176
Power L13360
Power MT164.61

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