Macon, Dublin & Savannah 4-6-0 "Ten-Wheeler" Locomotives in the USA


Class Details by Steve Llanso of Sweat House Media

Class 104 (Locobase 12572)

Data from Volume 24, p.115. See also DeGolyer, Volume 24, p. 115; and Richard E Prince, Seaboard Air Line Railway: Steam Boats, Locomotives, and History (Indiana University Press, 1969), pp. 103-106. Works numbers were 19735, 19766-19767 in November; 21578 in January 1901, 21624 in February.

Remarkably, the MD&S did not actually merge with the Seaboard Air Line until 1958. The road, which began construction south from Macon in 1885 toward Savannah, reached Dublin in 1891, but never grew longer than the 92 miles (148 km) between Macon and Vidalia. The southeastern end of the track gave the railroad its nickname of The Vidalia Line.

These Ten-wheel freighters were the only MD & S engines to be bought new (except for one 4-4-0 in 1909). They

Several other southeastern railroads would operate essentially identical locomotives; see Locobases 9349, 12824, 12839, and 12840. Locobase 8343 shows another of the same design at work in the Pacific Northwest.

Principal Dimensions by Steve Llanso of Sweat House Media
Class104
Locobase ID12,572
RailroadMacon, Dublin & Savannah
CountryUSA
Whyte4-6-0
Number in Class5
Road Numbers104-108
GaugeStd
Number Built5
BuilderBurnham, Williams & Co
Year1901
Valve GearStephenson
Locomotive Length and Weight
Driver Wheelbase (ft / m)11.33 / 3.45
Engine Wheelbase (ft / m)22.17 / 6.58
Ratio of driving wheelbase to overall engine wheebase 0.51
Overall Wheelbase (engine & tender) (ft / m) / 14.21
Axle Loading (Maximum Weight per Axle) (lbs / kg)
Weight on Drivers (lbs / kg)92,500 / 41,957
Engine Weight (lbs / kg)116,500 / 52,844
Tender Loaded Weight (lbs / kg)75,000 / 3629
Total Engine and Tender Weight (lbs / kg)191,500 / 56,473
Tender Water Capacity (gals / ML)4000 / 15.15
Tender Fuel Capacity (oil/coal) (gals/tons / ML/MT)4 / 3.60
Minimum weight of rail (calculated) (lb/yd / kg/m)51 / 25.50
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)56 / 1422
Boiler Pressure (psi / kPa)190 / 13.10
High Pressure Cylinders (dia x stroke) (in / mm)18" x 26" / 457x660
Tractive Effort (lbs / kg)24,294 / 11019.59
Factor of Adhesion (Weight on Drivers/Tractive Effort) 3.81
Heating Ability
Firebox Area (sq ft / m2)152 / 14.13
Grate Area (sq ft / m2)22.40 / 2.08
Evaporative Heating Surface (sq ft / m2)1920 / 178.44
Superheating Surface (sq ft / m2)
Combined Heating Surface (sq ft / m2)1920 / 178.44
Evaporative Heating Surface/Cylinder Volume250.73
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation4256
Same as above plus superheater percentage4256
Same as above but substitute firebox area for grate area28,880
Power L16206
Power MT443.74

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