Nahma & Northern 2-6-2 "Prairie" Locomotives in the USA
Class Details by Steve Llanso of Sweat House Media
Class 5 (Locobase 12929)
Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University Volume 43, p. 264. See also Charlie & Laurie MacIntosh's Nahma Inn web page at [
] . Works number was 38816 in November 1912.
Principal Dimensions by Steve Llanso of Sweat House Media | |
|---|---|
| Class | 5 |
| Locobase ID | 12929 |
| Railroad | Nahma & Northern |
| Country | USA |
| Whyte | 2-6-2 |
| Number in Class | 1 |
| Road Numbers | 5 |
| Gauge | Std |
| Number Built | 1 |
| Builder | Baldwin |
| Year | 1912 |
| Valve Gear | Stephenson |
| Locomotive Length and Weight | |
| Driver Wheelbase (ft / m) | 8 / 2.44 |
| Engine Wheelbase (ft / m) | 22.75 / 6.93 |
| Ratio of driving wheelbase to overall engine wheelbase | 0.35 |
| Overall Wheelbase (engine & tender) (ft / m) | |
| Axle Loading (Maximum Weight per Axle) (lbs / kg) | |
| Weight on Drivers (lbs / kg) | 58,000 / 26,308 |
| Engine Weight (lbs / kg) | 78,000 / 35,380 |
| Tender Loaded Weight (lbs / kg) | 44,000 / 19,958 |
| Total Engine and Tender Weight (lbs / kg) | 122,000 / 55,338 |
| Tender Water Capacity (gals / ML) | 2000 / 7.58 |
| Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | 3.50 / 3 |
| Minimum weight of rail (calculated) (lb/yd / kg/m) | 32 / 16 |
| Geometry Relating to Tractive Effort | |
| Driver Diameter (in / mm) | 42 / 1067 |
| Boiler Pressure (psi / kPa) | 180 / 12.40 |
| High Pressure Cylinders (dia x stroke) (in / mm) | 13" x 22" / 330x559 |
| Tractive Effort (lbs / kg) | 13,544 / 6143.46 |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 4.28 |
| 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 | 226.92 |
| 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 | 4239 |
| Power MT | 483.38 |