Manchester Saw Mills 2-6-2 "Prairie" Locomotives of the USA

Class Details by Steve Llanso of Sweat House Media

Class 4 (Locobase 14127)

Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University, Volume 43, p. 239. Works number was 39381 in February 1913.

The Manchester Saw Mills operated about 6.5 miles of track between Manchester, Ala and Sunlight and sometimes operated logging trains on the nearby Alabama Central Railroad. MSM told the AC in January 1926 that it had finished logging timber in the area. It then sold the 4 to locomotive rebuilder/reseller Birmingham Rail & Locomotive in October 1926. BR&L would sell the 4 more than two years later to Gibson Justis Co in May 1929 as their #12.

Specifications by Steve Llanso of Sweat House Media
Locobase ID14127
RailroadManchester Saw Mills
Number in Class1
Road Numbers4
Number Built1
Valve GearStephenson
Locomotive Length and Weight
Driver Wheelbase8'
Engine Wheelbase22.75'
Ratio of driving wheelbase to overall engine wheebase 0.35
Overall Wheelbase (engine & tender)44.33'
Axle Loading (Maximum Weight per Axle)
Weight on Drivers56500 lbs
Engine Weight76500 lbs
Tender Light Weight51000 lbs
Total Engine and Tender Weight127500 lbs
Tender Water Capacity2500 gals
Tender Fuel Capacity (oil/coal)3.5 tons
Minimum weight of rail (calculated)31 lb/yard
Geometry Relating to Tractive Effort
Driver Diameter42"
Boiler Pressure170 psi
Cylinders (dia x stroke)13" x 22"
Tractive Effort12792 lbs
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.42
Heating Ability
Firebox Area74 sq. ft
Grate Area13.30 sq. ft
Evaporative Heating Surface767 sq. ft
Superheating Surface
Combined Heating Surface767 sq. ft
Evaporative Heating Surface/Cylinder Volume226.94
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation2261
Same as above plus superheater percentage2261
Same as above but substitute firebox area for grate area12580
Power L14003
Power MT468.59

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