Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University, Volume 62, p. 348+.(Many thanks to Chris Hohl for 2 June 2015 email flagging an error in the driver diameter and noting the different fuels in the two locomotives.) Works numbers were 52850, 52918 in January 1920.
Locobases 14265-14266 show the four logging Prairies (14-17) that came to the WB Harbeson Lumber Company of De Funiak Springs. The last one trailed a larger tender, but was otherwise identical.
This next batch were bigger, had more cylinder volume, rolled on taller drivers and longer wheelbases, and had superheated boilers and larger fireboxes. Unlike the other two 1920 batches, which bore Bagdad Land and Lumber Company on their tenders, this pair was assigned to the F&A in Munson, Fla.
18 burned soft coal and had the tender shown in the specs. 19 burned oil; its tender carried 1,800 US gallons (6,831 litres) of oil in addition to the 4,000 gallons of water.
18 later worked the Mobile River Saw Mill Company. It then enjoyed a second career on tourist roads such as the Reese Central Railroad owned by Fred Stock, and the Dry Gulch & Tombstone Railroad.
19 was sold to locomotive rebuilder/reseller Georgia Car & Locomotive, which found a buyer in the Roscoe, Snyder & Pacific of Roscoe, Tex as their #5. After its operating days ended, it went on display.
| Principal Dimensions by Steve Llanso of Middle Run Media | |
|---|---|
| Class | 18 |
| Locobase ID | 14267 |
| Railroad | Florida & Alabama |
| Country | USA |
| Whyte | 2-6-2 |
| Number in Class | 2 |
| Road Numbers | 18-19 |
| Gauge | Std |
| Number Built | 2 |
| Builder | Baldwin |
| Year | 1920 |
| Valve Gear | Walschaert |
| Locomotive Length and Weight | |
| Driver Wheelbase (ft / m) | 10.25 / 3.12 |
| Engine Wheelbase (ft / m) | 26.83 / 8.18 |
| Ratio of driving wheelbase to overall engine wheelbase | 0.38 |
| Overall Wheelbase (engine & tender) (ft / m) | 50.37 / 15.35 |
| Axle Loading (Maximum Weight per Axle) (lbs / kg) | |
| Weight on Drivers (lbs / kg) | 98,000 / 44,452 |
| Engine Weight (lbs / kg) | 127,800 / 57,969 |
| Tender Loaded Weight (lbs / kg) | 80,000 / 36,287 |
| Total Engine and Tender Weight (lbs / kg) | 207,800 / 94,256 |
| Tender Water Capacity (gals / ML) | 4000 / 15.15 |
| Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | 8 / 7 |
| Minimum weight of rail (calculated) (lb/yd / kg/m) | 54 / 27 |
| Geometry Relating to Tractive Effort | |
| Driver Diameter (in / mm) | 50 / 1118 |
| Boiler Pressure (psi / kPa) | 180 / 1240 |
| High Pressure Cylinders (dia x stroke) (in / mm) | 17" x 24" / 432x610 |
| Tractive Effort (lbs / kg) | 21,224 / 9627.06 |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 4.62 |
| Heating Ability | |
| Tubes (number - dia) (in / mm) | 112 - 2" / 51 |
| Flues (number - dia) (in / mm) | 18 - 5.375" / 137 |
| Flue/Tube length (ft / m) | 13.75 / 4.19 |
| Firebox Area (sq ft / m2) | 100 / 9.29 |
| Grate Area (sq ft / m2) | 18.70 / 1.74 |
| Evaporative Heating Surface (sq ft / m2) | 1248 / 115.94 |
| Superheating Surface (sq ft / m2) | 292 / 27.13 |
| Combined Heating Surface (sq ft / m2) | 1540 / 143.07 |
| Evaporative Heating Surface/Cylinder Volume | 197.78 |
| Computations Relating to Power Output (More Information) | |
| Robert LeMassena's Power Computation | 3366 |
| Same as above plus superheater percentage | 4006 |
| Same as above but substitute firebox area for grate area | 21,420 |
| Power L1 | 10,403 |
| Power MT | 702.08 |
