Gainesville Midland 4-6-0 "Ten-Wheeler" Locomotives in the USA

Class Details by Steve Llanso of Sweat House Media

Class 100 (Locobase 12956)

Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University Vol 28, p 293. See the entry at the Rail Georgia Railroad History website at . Works number was 28877 in August 1906.

Georgia short line GM set up in 1906, its core much of the foreclosed property of the narrow-gauge Gainesville, Jefferson & Southern; its trackage connected Gainesville, Jefferson, and Monroe. The Rail Georgia account tells us that until 1908, the only standard-gauge portion of the system was the 19 southernmost miles built in 1906 from Jefferson to the Seaboard Air Line connection at Fowler Junction, 2 miles outside of Athens.

Probably because of delays in constructing the standard-gauge section, the first 100 produced in April 1906 was sent to the New Mexico Midland (See Locobase 12957). The spec for the order stated that the locomotive "....must draw 155 to 170 tons of 2000 lbs. of cars an dloading up a grade of 3% in conjunction with 14-degree curve [269-ft curve radius] at 8 to 10 miles per hour, or 450 tons on level track at 50 miles per hour."

Principal Dimensions by Steve Llanso of Sweat House Media
Locobase ID12,956
RailroadGainesville Midland
Number in Class1
Road Numbers100
Number Built1
BuilderBurnham, Williams & Co
Valve GearStephenson
Locomotive Length and Weight
Driver Wheelbase (ft / m)14 / 4.27
Engine Wheelbase (ft / m)24.25 / 7.39
Ratio of driving wheelbase to overall engine wheebase 0.58
Overall Wheelbase (engine & tender) (ft / m)
Axle Loading (Maximum Weight per Axle) (lbs / kg)
Weight on Drivers (lbs / kg)96,000 / 43,545
Engine Weight (lbs / kg)126,000 / 57,153
Tender Loaded Weight (lbs / kg)120,000 / 54,431
Total Engine and Tender Weight (lbs / kg)246,000 / 111,584
Tender Water Capacity (gals / ML)6000 / 22.73
Tender Fuel Capacity (oil/coal) (gals/tons / ML/MT)
Minimum weight of rail (calculated) (lb/yd / kg/m)53 / 26.50
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)56 / 1422
Boiler Pressure (psi / kPa)180 / 12.40
High Pressure Cylinders (dia x stroke) (in / mm)19" x 24" / 483x610
Tractive Effort (lbs / kg)23,671 / 10737.00
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.06
Heating Ability
Firebox Area (sq ft / m2)128 / 11.90
Grate Area (sq ft / m2)40 / 3.72
Evaporative Heating Surface (sq ft / m2)1912 / 177.70
Superheating Surface (sq ft / m2)
Combined Heating Surface (sq ft / m2)1912 / 177.70
Evaporative Heating Surface/Cylinder Volume242.77
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation7200
Same as above plus superheater percentage7200
Same as above but substitute firebox area for grate area23,040
Power L15444
Power MT375.06

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Wes Barris