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 ID12,600
RailroadNew Haven & Dunbar
Number in Class1
Road Numbers15
Number Built1
BuilderBurnham, Williams & Co
Valve GearStephenson
Locomotive Length and Weight
Driver Wheelbase (ft)7
Engine Wheelbase (ft)17.50
Ratio of driving wheelbase to overall engine wheebase 0.40
Overall Wheelbase (engine & tender) (ft)17.50
Axle Loading (Maximum Weight per Axle) (lbs)
Weight on Drivers (lbs)90,000
Engine Weight (lbs)100,000
Tender Loaded Weight (lbs)
Total Engine and Tender Weight (lbs)100,000
Tender Water Capacity (gals)1000
Tender Fuel Capacity (oil/coal) (gals/tons)
Minimum weight of rail (calculated) (lb/yd)75
Geometry Relating to Tractive Effort
Driver Diameter (in)50
Boiler Pressure (psi)160
High Pressure Cylinders (dia x stroke) (in)17" x 24"
Tractive Effort (lbs)18,866
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.77
Heating Ability
Firebox Area (sq ft)88.60
Grate Area (sq ft)13.90
Evaporative Heating Surface (sq ft)1146
Superheating Surface (sq ft)
Combined Heating Surface (sq ft)1146
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 area14,176
Power L13360
Power MT164.61

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