W M Carney Mill Company 2-6-2 "Prairie" Locomotives in the USA
Class Details by Steve Llanso of Sweat House Media
Class 4 (Locobase 13834)
Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University, Volume 39, p. 87. See also the Frank-and-Anne correspondence [
], last accessed 4 February 2012. Works number was 36775 in August 1911.
Given that the 4 had to traverse 30-lb/yard (15-kg/metre) rail, this little wood-burning Prairie had to be a light stepper in the woods near Atmore, Ala. Atmore lies on the very northestern point of the border between Alabama and Florida.
The W Carney Mill Company sold the 4 after about 12 years of service to locomotive rebuilder/reseller Birmingham Rail & Locomotive. BR & L found Russ Lumber of Arcadia, Fla would buy the engine in August 1924 as thei 102. As the 4/102 was one of Baldwin's standard logging Prairie designs, it wasn't a big surprise when its next owner was Nocatee Crate (of Nocatee, Fla).
| Principal Dimensions by Steve Llanso of Middle Run Media | |
|---|---|
| Class | 4 |
| Locobase ID | 13834 |
| Railroad | W M Carney Mill Company |
| Country | USA |
| Whyte | 2-6-2 |
| Number in Class | 1 |
| Road Numbers | 4 / 102 |
| Gauge | Std |
| Number Built | 1 |
| Builder | Baldwin |
| Year | 1911 |
| Valve Gear | Stephenson |
| Locomotive Length and Weight | |
| Driver Wheelbase (ft / m) | 8 / 3.35 |
| Engine Wheelbase (ft / m) | 22.75 / 6.48 |
| Ratio of driving wheelbase to overall engine wheelbase | 0.35 |
| Overall Wheelbase (engine & tender) (ft / m) | / 14 |
| Axle Loading (Maximum Weight per Axle) (lbs / kg) | |
| Weight on Drivers (lbs / kg) | 57,000 / 25,401 |
| Engine Weight (lbs / kg) | 77,000 / 34,473 |
| Tender Loaded Weight (lbs / kg) | 50,500 / 19,958 |
| Total Engine and Tender Weight (lbs / kg) | 127,500 / 54,431 |
| Tender Water Capacity (gals / ML) | 2500 / 7.58 |
| Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | / 3 |
| Minimum weight of rail (calculated) (lb/yd / kg/m) | 32 / 16 |
| Geometry Relating to Tractive Effort | |
| Driver Diameter (in / mm) | 44 / 1067 |
| Boiler Pressure (psi / kPa) | 180 / 1170 |
| High Pressure Cylinders (dia x stroke) (in / mm) | 13.5" x 22" / 330x559 |
| Tractive Effort (lbs / kg) | 13,942 / 6323.99 |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 4.09 |
| Heating Ability | |
| Tubes (number - dia) (in / mm) | 116 - 2" / 51 |
| Flues (number - dia) (in / mm) | |
| Flue/Tube length (ft / m) | 11.50 / 3.51 |
| Firebox Area (sq ft / m2) | 74 / 6.87 |
| Grate Area (sq ft / m2) | 13.30 / 1.24 |
| Evaporative Heating Surface (sq ft / m2) | 767 / 71.26 |
| Superheating Surface (sq ft / m2) | |
| Combined Heating Surface (sq ft / m2) | 767 / 71.26 |
| Evaporative Heating Surface/Cylinder Volume | 210.71 |
| Computations Relating to Power Output (More Information) | |
| Robert LeMassena's Power Computation | 2394 |
| Same as above plus superheater percentage | 2394 |
| Same as above but substitute firebox area for grate area | 13,320 |
| Power L1 | 4123 |
| Power MT | 478.40 |