Macon, Dublin & Savannah 4-6-0 "Ten-wheeler" Locomotives of the USA


Class Details by Steve Llanso of Sweat House Media

Class 104 (Locobase 12572)

Data from Volume 24, p.115. See also 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-wheelers operated freights were the only MD & S engines to be bought new (except for one 4-4-0 in 1909).

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.

Specifications 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)11.33
Engine Wheelbase (ft)22.17
Ratio of driving wheelbase to overall engine wheebase 0.51
Overall Wheelbase (engine & tender) (ft)
Axle Loading (Maximum Weight per Axle) (lbs)
Weight on Drivers (lbs)92,500
Engine Weight (lbs)116,500
Tender Loaded Weight (lbs)75,000
Total Engine and Tender Weight (lbs)191,500
Tender Water Capacity (gals)4000
Tender Fuel Capacity (oil/coal) (gals/tons)4
Minimum weight of rail (calculated) (lb/yd)51
Geometry Relating to Tractive Effort
Driver Diameter (in)56
Boiler Pressure (psi)190
High Pressure Cylinders (dia x stroke) (in)18" x 26"
Tractive Effort (lbs)24,294
Factor of Adhesion (Weight on Drivers/Tractive Effort) 3.81
Heating Ability
Firebox Area (sq ft)152
Grate Area (sq ft)22.40
Evaporative Heating Surface (sq ft)1920
Superheating Surface (sq ft)
Combined Heating Surface (sq ft)1920
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