Missouri & Louisiana 2-6-2 "Prairie" Locomotives in the USA
Class Details by Steve Llanso of Sweat House Media
Class 115 (Locobase 13184)
Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University Volume 47, p. 259. See also Mississippi Rails entry at [
], last accessed 22 September 2011. Works number was 40082 in June 1913.
Even though the specifications cite 6 and 7% grades on this logging road, Locobase suspects the steepest sections were reserved for the geared Shays. The M & L bought this Prairie about a year before the company was reorganized as Delta Land & Timber. At that point the Louisiana portion of the M & L was renamed the Neame, Carson & Southern Railroad.
DL & T would transfer the 115 to Conroe Timber in Conroe, Texas as their 204 by January 1921. It would then be sold to Foster Lumber Company of Fostoria, Texas in April 1929.
| Principal Dimensions by Steve Llanso of Middle Run Media | |
|---|---|
| Class | 115 |
| Locobase ID | 13184 |
| Railroad | Missouri & Louisiana |
| Country | USA |
| Whyte | 2-6-2 |
| Number in Class | 1 |
| Road Numbers | 115 |
| Gauge | Std |
| Number Built | 1 |
| Builder | Baldwin |
| Year | 1913 |
| Valve Gear | Stephenson |
| Locomotive Length and Weight | |
| Driver Wheelbase (ft / m) | 9.17 / 2.80 |
| Engine Wheelbase (ft / m) | 23.75 / 7.24 |
| Ratio of driving wheelbase to overall engine wheelbase | 0.39 |
| Overall Wheelbase (engine & tender) (ft / m) | 48.67 / 14.83 |
| Axle Loading (Maximum Weight per Axle) (lbs / kg) | |
| Weight on Drivers (lbs / kg) | 64,000 / 29,030 |
| Engine Weight (lbs / kg) | 88,000 / 39,916 |
| Tender Loaded Weight (lbs / kg) | 60,000 / 27,216 |
| Total Engine and Tender Weight (lbs / kg) | 148,000 / 67,132 |
| Tender Water Capacity (gals / ML) | 4000 / 15.15 |
| Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | 6 / 6 |
| Minimum weight of rail (calculated) (lb/yd / kg/m) | 36 / 18 |
| Geometry Relating to Tractive Effort | |
| Driver Diameter (in / mm) | 46 / 1168 |
| Boiler Pressure (psi / kPa) | 180 / 1240 |
| High Pressure Cylinders (dia x stroke) (in / mm) | 15" x 20" / 381x508 |
| Tractive Effort (lbs / kg) | 14,967 / 6788.93 |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 4.28 |
| Heating Ability | |
| Tubes (number - dia) (in / mm) | 147 - 2" / 51 |
| Flues (number - dia) (in / mm) | |
| Flue/Tube length (ft / m) | 11.87 / 3.62 |
| Firebox Area (sq ft / m2) | 82 / 7.62 |
| Grate Area (sq ft / m2) | 14 / 1.30 |
| Evaporative Heating Surface (sq ft / m2) | 991 / 92.07 |
| Superheating Surface (sq ft / m2) | |
| Combined Heating Surface (sq ft / m2) | 991 / 92.07 |
| Evaporative Heating Surface/Cylinder Volume | 242.30 |
| Computations Relating to Power Output (More Information) | |
| Robert LeMassena's Power Computation | 2520 |
| Same as above plus superheater percentage | 2520 |
| Same as above but substitute firebox area for grate area | 14,760 |
| Power L1 | 4727 |
| Power MT | 488.50 |