Alabama, Tennessee & Northern 2-8-0 "Consolidation" Locomotives in the USA


Class Details by Steve Llanso of Sweat House Media

Class 201 (Locobase 13911)

Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University Volume 41, p. 126. Works number was 38477 in October 1912.

Suited to the 60-75 lb/yard (30-37.5 kg/metre) rail of this short line, the 201 was the only Baldwin Consolidation on the roster.


Class 202 (Locobase 14991)

Data from Roy V Wright (Ed.) 1922 Locomotive Cyclopedia of American Practice, Sixth Edition (New York: Simmons-Boardman Publishing Company, 1922), p. 123. See also the AT&N entry at Mississippi Rails, last accessed at http://www.msrailroads.com/AT&N.htm on 9 March 2013. Works numbers were 5929 and 5984 in May 1920.

For some reason, Lima's price for the 202 was $24,273 while the 203 cost $27,635. The 202 would later bear road number #15 for the Frankfort & Cincinnati of Frankfort, Ky while the 203 served the Gulf Shipbuilding Corporation in Chickasaw, Ala in the early 1940s before being sold to the Masonite Corporation in Laurel, Miss as their 100 on 14 December 1942.

Locobase suspects that AT&N 203-205 (Lima 6239-6240 in January 1922 and 6958 in October 1925) were at least blood relatives, if not exact duplicates.

Principal Dimensions by Steve Llanso of Sweat House Media
Class201202
Locobase ID13,911 14,991
RailroadAlabama, Tennessee & NorthernAlabama, Tennessee & Northern
CountryUSAUSA
Whyte2-8-02-8-0
Number in Class12
Road Numbers201202-203
GaugeStdStd
Number Built12
BuilderBaldwinLima
Year19121920
Valve GearWalschaertWalschaert
Locomotive Length and Weight
Driver Wheelbase (ft / m)15 / 4.5713.67 / 4.17
Engine Wheelbase (ft / m)23.58 / 7.1921.67 / 6.61
Ratio of driving wheelbase to overall engine wheebase 0.64 0.63
Overall Wheelbase (engine & tender) (ft / m)53.31 / 16.25
Axle Loading (Maximum Weight per Axle) (lbs / kg)
Weight on Drivers (lbs / kg)133,000 / 60,328142,000 / 64,410
Engine Weight (lbs / kg)148,000 / 67,132157,000 / 71,214
Tender Loaded Weight (lbs / kg)100,000 / 45,359
Total Engine and Tender Weight (lbs / kg)248,000 / 112,491
Tender Water Capacity (gals / ML)5000 / 18.94
Tender Fuel Capacity (oil/coal) (gals/tons / ML/MT)8 / 7.30
Minimum weight of rail (calculated) (lb/yd / kg/m)55 / 27.5059 / 29.50
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)56 / 142246 / 1168
Boiler Pressure (psi / kPa)180 / 12.40200 / 13.80
High Pressure Cylinders (dia x stroke) (in / mm)20" x 26" / 508x66020" x 24" / 508x610
Tractive Effort (lbs / kg)28,414 / 12888.3935,478 / 16092.57
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.68 4.00
Heating Ability
Firebox Area (sq ft / m2)153 / 14.21133 / 12.36
Grate Area (sq ft / m2)31.50 / 2.9337.50 / 3.48
Evaporative Heating Surface (sq ft / m2)2133 / 198.161965 / 182.55
Superheating Surface (sq ft / m2)
Combined Heating Surface (sq ft / m2)2133 / 198.161965 / 182.55
Evaporative Heating Surface/Cylinder Volume225.62225.17
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation56707500
Same as above plus superheater percentage56707500
Same as above but substitute firebox area for grate area27,54026,600
Power L151504621
Power MT341.47286.97

  • 202 (Theodore Gay Photo, YesterYearDepot)
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