Americus, Preston & Lumpkin 4-4-0 "American" Locomotives in 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.
| Principal Dimensions by Steve Llanso of Middle Run Media | |
|---|---|
| Class | W A Gregory |
| Locobase ID | 11856 |
| Railroad | Americus, Preston & Lumpkin (SAM) |
| Country | USA |
| Whyte | 4-4-0 |
| Number in Class | 1 |
| Road Numbers | 3 |
| Gauge | 3' |
| Number Built | 1 |
| Builder | Burnham, Parry, Williams & Co |
| Year | 1886 |
| Valve Gear | Stephenson |
| Locomotive Length and Weight | |
| Driver Wheelbase (ft / m) | 7.17 / 2.19 |
| Engine Wheelbase (ft / m) | 18.25 / 5.56 |
| Ratio of driving wheelbase to overall engine wheelbase | 0.39 |
| Overall Wheelbase (engine & tender) (ft / m) | |
| Axle Loading (Maximum Weight per Axle) (lbs / kg) | |
| Weight on Drivers (lbs / kg) | 26,000 / 11,793 |
| Engine Weight (lbs / kg) | 39,000 / 17,690 |
| Tender Loaded Weight (lbs / kg) | |
| Total Engine and Tender Weight (lbs / kg) | |
| Tender Water Capacity (gals / ML) | 1200 / 4.55 |
| Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | |
| Minimum weight of rail (calculated) (lb/yd / kg/m) | 22 / 11 |
| Geometry Relating to Tractive Effort | |
| Driver Diameter (in / mm) | 43 / 1092 |
| Boiler Pressure (psi / kPa) | 130 / 900 |
| High Pressure Cylinders (dia x stroke) (in / mm) | 12" x 16" / 305x406 |
| Tractive Effort (lbs / kg) | 5921 / 2685.72 |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 4.39 |
| Heating Ability | |
| Tubes (number - dia) (in / mm) | 113 - 1.5" / 38 |
| Flues (number - dia) (in / mm) | |
| Flue/Tube length (ft / m) | 8.81 / 2.69 |
| Firebox Area (sq ft / m2) | 52 / 4.83 |
| Grate Area (sq ft / m2) | 8.10 / 0.75 |
| Evaporative Heating Surface (sq ft / m2) | 439 / 40.80 |
| Superheating Surface (sq ft / m2) | |
| Combined Heating Surface (sq ft / m2) | 439 / 40.80 |
| Evaporative Heating Surface/Cylinder Volume | 210.05 |
| Computations Relating to Power Output (More Information) | |
| Robert LeMassena's Power Computation | 1053 |
| Same as above plus superheater percentage | 1053 |
| Same as above but substitute firebox area for grate area | 6760 |
| Power L1 | 3116 |
| Power MT | 528.43 |