Union Railway of Chattanooga 2-4-4 Locomotives of the USA


Class Details by Steve Llanso of Sweat House Media

Class 21 (Locobase 11671)

Data from Baldwin Locomotive Works Specification for Engines, 1888, as digitized by the DeGolyer Library of Southern Methodist University Vol 14, 126.

Works numbers were 9115 in March 1888, 9246 in May, and

Connelly's notes say that 19 was delivered as a 2-4-2T and later converted, but the specification indicates that it was ordered with the 2-4-4T arrangement.

By 1902, 19 and 20 had been sold to Ducktown Sulphur Copper & Iron Company, possibly renumbered to 1 and 2. DSC&I was a British company that reopened copper mines in Tennessee in the 1890s and used an "open-roasting" form of ore extraction. The method inspired an early instance (1904) of property owners suing to stop environmental damage from a lawful corporation (The plaintiffs lost, appealed and won, and lost again at the Tennessee Supreme Court level.)

Sold in 1928 to locomotive recycler Georgia Car & Locomotive, 1 was apparently sold to W C Meredith of Atlanta later that year. 2 went to Carroll Brothers.

The 21 worked for several railways in the Southeast. In September 1895, it went to the Belt Railway of Chattanooga from which it was sold in 1905 to locomotive recycler Southern Iron & Equipment. Then came a series of lumber jobs starting with SI & E's sale to Decatur Lumber in July 1905, which sold it to Scotch Lumber in 1907. Scotch disposed of the tank in January 1912 by selling it to locomotive recycler Birmingham Rail & Locomotive, which sold it to Salco Lumber in April 1913.

Specifications by Steve Llanso of Sweat House Media
Class21
Locobase ID11671
RailroadUnion Railway of Chattanooga
CountryUSA
Whyte2-4-4T
Number in Class3
Road Numbers21
GaugeStd
Number Built3
BuilderBurnham, Parry, Williams & Co
Year1888
Valve GearStephenson
Locomotive Length and Weight
Driver Wheelbase 6.50'
Engine Wheelbase25.75'
Ratio of driving wheelbase to overall engine wheebase 0.25
Overall Wheelbase (engine & tender)25.75'
Axle Loading (Maximum Weight per Axle)
Weight on Drivers38000 lbs
Engine Weight65000 lbs
Tender Light Weight
Total Engine and Tender Weight65000 lbs
Tender Water Capacity900 gals
Tender Fuel Capacity (oil/coal)
Minimum weight of rail (calculated)32 lb/yard
Geometry Relating to Tractive Effort
Driver Diameter46"
Boiler Pressure130 psi
Cylinders (dia x stroke)12" x 20"
Tractive Effort6918 lbs
Factor of Adhesion (Weight on Drivers/Tractive Effort) 5.49
Heating Ability
Firebox Area63.04 sq. ft
Grate Area12.90 sq. ft
Evaporative Heating Surface665 sq. ft
Superheating Surface
Combined Heating Surface665 sq. ft
Evaporative Heating Surface/Cylinder Volume254.01
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation1677
Same as above plus superheater percentage1677
Same as above but substitute firebox area for grate area8195
Power L13732
Power MT433.03


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