Danville & Western 4-6-0 "Ten-wheeler" Locomotives of the USA

Class Details by Steve Llanso of Sweat House Media

Class 20 (Locobase 12837)

Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University Volume 28, p.129. Baldwin works number was 26574 in October 1905. See Locobase 12836 for a brief description of the D & W.

Locobase 12836 describes the Consolidation stablemate that shared the same boiler and grate. The commonality of parts between the these two engines is striking. The grate and firebox have identical dimensions and the only difference in the boiler tube layout is that each was 12" shorter in this Ten-wheeler. Tenders were identical, too. Cylinder volume measured slightly less because of the smaller diameter of the cylinders and driver diameter was a bit greater.

Specifications by Steve Llanso of Sweat House Media
Locobase ID12,837
RailroadDanville & Western
Number in Class1
Road Numbers20
Number Built1
BuilderBurnham, Williams & Co
Valve GearStephenson
Locomotive Length and Weight
Driver Wheelbase (ft)11.75
Engine Wheelbase (ft)21.83
Ratio of driving wheelbase to overall engine wheebase 0.54
Overall Wheelbase (engine & tender) (ft)
Axle Loading (Maximum Weight per Axle) (lbs)
Weight on Drivers (lbs)110,000
Engine Weight (lbs)140,000
Tender Loaded Weight (lbs)90,000
Total Engine and Tender Weight (lbs)230,000
Tender Water Capacity (gals)4500
Tender Fuel Capacity (oil/coal) (gals/tons)10
Minimum weight of rail (calculated) (lb/yd)61
Geometry Relating to Tractive Effort
Driver Diameter (in)56
Boiler Pressure (psi)200
High Pressure Cylinders (dia x stroke) (in)19" x 26"
Tractive Effort (lbs)28,493
Factor of Adhesion (Weight on Drivers/Tractive Effort) 3.86
Heating Ability
Firebox Area (sq ft)126
Grate Area (sq ft)38.50
Evaporative Heating Surface (sq ft)2163
Superheating Surface (sq ft)
Combined Heating Surface (sq ft)2163
Evaporative Heating Surface/Cylinder Volume253.51
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation7700
Same as above plus superheater percentage7700
Same as above but substitute firebox area for grate area25,200
Power L16111
Power MT367.43

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