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
Locobase ID11,671
RailroadUnion Railway of Chattanooga
Number in Class3
Road Numbers21
Number Built3
BuilderBurnham, Parry, Williams & Co
Valve GearStephenson
Locomotive Length and Weight
Driver Wheelbase (ft) 6.50
Engine Wheelbase (ft)25.75
Ratio of driving wheelbase to overall engine wheebase 0.25
Overall Wheelbase (engine & tender) (ft)25.75
Axle Loading (Maximum Weight per Axle) (lbs)
Weight on Drivers (lbs)38,000
Engine Weight (lbs)65,000
Tender Loaded Weight (lbs)
Total Engine and Tender Weight (lbs)65,000
Tender Water Capacity (gals)900
Tender Fuel Capacity (oil/coal) (gals/tons)
Minimum weight of rail (calculated) (lb/yd)32
Geometry Relating to Tractive Effort
Driver Diameter (in)46
Boiler Pressure (psi)130
High Pressure Cylinders (dia x stroke) (in)12" x 20"
Tractive Effort (lbs)6918
Factor of Adhesion (Weight on Drivers/Tractive Effort) 5.49
Heating Ability
Firebox Area (sq ft)63.04
Grate Area (sq ft)12.90
Evaporative Heating Surface (sq ft)665
Superheating Surface (sq ft)
Combined Heating Surface (sq ft)665
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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