Macon, Dublin & Savannah 4-4-0 "American" Locomotives of the USA

Class Details by Steve Llanso of Sweat House Media

Class 100 (Locobase 12573)

Data from Volume 45, p.152. Works number was 33517 in June 1909.

Although the MD&S did not actually merge with the Seaboard Air Line until 1958, it was such a small line that it bought very few locomotives new. Still, it acquired this little Eight-wheeler from the builder itself.

Specifications by Steve Llanso of Sweat House Media
Locobase ID12573
RailroadMacon, Dublin & Savannah
Number in Class1
Road Numbers100 / 98
Number Built1
Valve GearStephenson
Locomotive Length and Weight
Driver Wheelbase 9.08'
Engine Wheelbase24.29'
Ratio of driving wheelbase to overall engine wheebase 0.37
Overall Wheelbase (engine & tender)
Axle Loading (Maximum Weight per Axle)
Weight on Drivers73000 lbs
Engine Weight116000 lbs
Tender Light Weight70000 lbs
Total Engine and Tender Weight186000 lbs
Tender Water Capacity3500 gals
Tender Fuel Capacity (oil/coal)
Minimum weight of rail (calculated)61 lb/yard
Geometry Relating to Tractive Effort
Driver Diameter62"
Boiler Pressure180 psi
Cylinders (dia x stroke)18" x 24"
Tractive Effort19189 lbs
Factor of Adhesion (Weight on Drivers/Tractive Effort) 3.80
Heating Ability
Firebox Area152.70 sq. ft
Grate Area18.60 sq. ft
Evaporative Heating Surface1690 sq. ft
Superheating Surface
Combined Heating Surface1690 sq. ft
Evaporative Heating Surface/Cylinder Volume239.09
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation3348
Same as above plus superheater percentage3348
Same as above but substitute firebox area for grate area27486
Power L16456
Power MT389.95

If you have any railroad data such as diagram books, rail station plans or anything else that you would be willing to share, please contact us.