Baldwin 4-6-0 "Ten-wheeler" Locomotives of the USA


Class Details by Steve Llanso of Sweat House Media

Class Baldwin compound (Locobase 12007)

Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University Volume 17, p. 131. Works number was 12286 in October 1891.

This demonstrator is credited with sparking considerable interest in Samuel Vauclain's four-cylinder compounding system. Arguing for its usefulness as a true mixed-traffic locomotive, Baldwin built a large Ten-wheeler with relatively tall drivers, painted it olive green and gold, and let railroads across the country try out the design over the next five years.

The June 1892 Railroad & Engineering Journal (p. 254) reported that the 82 ran continuously from Philadelphia to Chicago, stopping only to refuel and take on water. Its train consisted of 20 Forney locomotives intended for use on the Chicago & South Side Elevated.

After its career as a demonstrator, 82 was rebuilt in 1896 as a simple-expansion freight engine with 19" x 24" and 54" drivers. It was sold to the Coudersport & Port Allegany as its #1 and operated for 45 more years.

Specifications by Steve Llanso of Sweat House Media
ClassBaldwin compound
Locobase ID12,007
RailroadBaldwin
CountryUSA
Whyte4-6-0
Number in Class1
Road Numbers82
GaugeStd
Number Built1
BuilderBurnham, Williams & Co
Year1891
Valve GearStephenson
Locomotive Length and Weight
Driver Wheelbase (ft)12.50
Engine Wheelbase (ft)31.17
Ratio of driving wheelbase to overall engine wheebase 0.40
Overall Wheelbase (engine & tender) (ft)
Axle Loading (Maximum Weight per Axle) (lbs)
Weight on Drivers (lbs)98,000
Engine Weight (lbs)125,000
Tender Loaded Weight (lbs)
Total Engine and Tender Weight (lbs)
Tender Water Capacity (gals)2600
Tender Fuel Capacity (oil/coal) (gals/tons)
Minimum weight of rail (calculated) (lb/yd)54
Geometry Relating to Tractive Effort
Driver Diameter (in)72
Boiler Pressure (psi)180
High Pressure Cylinders (dia x stroke) (in)14" x 24"
Low Pressure Cylinders (dia x stroke) (in)24" x 24"
Tractive Effort (lbs)14,916
Factor of Adhesion (Weight on Drivers/Tractive Effort) 6.57
Heating Ability
Firebox Area (sq ft)169.70
Grate Area (sq ft)27.50
Evaporative Heating Surface (sq ft)2135
Superheating Surface (sq ft)
Combined Heating Surface (sq ft)2135
Evaporative Heating Surface/Cylinder Volume499.29
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation4950
Same as above plus superheater percentage4950
Same as above but substitute firebox area for grate area30,546
Power L15128
Power MT346.08


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