Marietta & North Georgia 2-8-0 "Consolidation" Locomotives in the USA

Class Details by Steve Llanso of Sweat House Media

Class 25 (Locobase 12056)

Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University Vol 18, p 124. Works number was 13108 in December 1892

This lone Vauclain compound Consolidation went with the M&NG when it was transformed into the Atlanta, Knoxville & Northern. In 1898, the 25 was sold to the Texas Central and renumbered 112; it was renumbered 681 when the TC was absorbed by the Missouri-Kansas-Texas. In 1914, the Katy rebuilt the engine with 19" x 24" simple-expanson cylinders.

Principal Dimensions by Steve Llanso of Sweat House Media
Locobase ID12,056
RailroadMarietta & North Georgia
Number in Class1
Road Numbers25
Number Built1
BuilderBurnham, Williams & Co
Valve GearStephenson
Locomotive Length and Weight
Driver Wheelbase (ft / m)13.67 / 4.17
Engine Wheelbase (ft / m)21.58 / 6.58
Ratio of driving wheelbase to overall engine wheebase 0.63
Overall Wheelbase (engine & tender) (ft / m)
Axle Loading (Maximum Weight per Axle) (lbs / kg)
Weight on Drivers (lbs / kg)106,000 / 48,081
Engine Weight (lbs / kg)120,000 / 54,431
Tender Loaded Weight (lbs / kg)
Total Engine and Tender Weight (lbs / kg)
Tender Water Capacity (gals / ML)3500 / 13.26
Tender Fuel Capacity (oil/coal) (gals/tons / ML/MT)
Minimum weight of rail (calculated) (lb/yd / kg/m)44 / 22
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)50 / 1270
Boiler Pressure (psi / kPa)180 / 12.40
High Pressure Cylinders (dia x stroke) (in / mm)13" x 24" / 330x610
Low Pressure Cylinders (dia x stroke) (in / mm)22" x 24" / 559x610
Tractive Effort (lbs / kg)18,398 / 8345.20
Factor of Adhesion (Weight on Drivers/Tractive Effort) 5.76
Heating Ability
Firebox Area (sq ft / m2)142.40 / 13.23
Grate Area (sq ft / m2)17.10 / 1.59
Evaporative Heating Surface (sq ft / m2)1726 / 160.41
Superheating Surface (sq ft / m2)
Combined Heating Surface (sq ft / m2)1726 / 160.41
Evaporative Heating Surface/Cylinder Volume468.13
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation3078
Same as above plus superheater percentage3078
Same as above but substitute firebox area for grate area25,632
Power L13463
Power MT288.10

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Wes Barris