Americus, Preston & Lumpkin 4-4-0 "American" Locomotives of the USA

Class Details by Steve Llanso of Sweat House Media

Class W A Gregory (Locobase 11856)

Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University Vol 13, p. 122. Works number was 8145 in September 1886. See for a history of this railroad

The AP & L was chartered in 1884 It would be the only railroad in Georgia to use only local financing, primarily from wealthy investors in Americus itself. Its original construction as a narrow-gauge line among the three named towns, the latter two county seats without rail service of any kind, provided energy of its own. The instant Eight-wheeler in this entry may have been modest in scale, but it supported a new level of accessibility.

See Locobase 11575 for the SAM's later history.

Specifications by Steve Llanso of Sweat House Media
ClassW A Gregory
Locobase ID11856
RailroadAmericus, Preston & Lumpkin (SAM)
Number in Class1
Road Numbers3
Number Built1
BuilderBurnham, Parry, Williams & Co
Valve GearStephenson
Locomotive Length and Weight
Driver Wheelbase 7.17'
Engine Wheelbase18.25'
Ratio of driving wheelbase to overall engine wheebase 0.39
Overall Wheelbase (engine & tender)
Axle Loading (Maximum Weight per Axle)
Weight on Drivers26000 lbs
Engine Weight39000 lbs
Tender Light Weight
Total Engine and Tender Weight
Tender Water Capacity1200 gals
Tender Fuel Capacity (oil/coal)
Minimum weight of rail (calculated)22 lb/yard
Geometry Relating to Tractive Effort
Driver Diameter43"
Boiler Pressure130 psi
Cylinders (dia x stroke)12" x 16"
Tractive Effort5921 lbs
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.39
Heating Ability
Firebox Area52 sq. ft
Grate Area 8.10 sq. ft
Evaporative Heating Surface439 sq. ft
Superheating Surface
Combined Heating Surface439 sq. ft
Evaporative Heating Surface/Cylinder Volume209.61
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation1053
Same as above plus superheater percentage1053
Same as above but substitute firebox area for grate area6760
Power L13109
Power MT527.24

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