Data from 1904 M & NA locomotive diagram book supplied in May 2005 by Allen Stanley from his extensive Rail Data Exchange. See also DeGolyer, Volume 25, p. 122. Works numbers were 21456 and 21462 in January 1903.
The M&NA went to Baldwin to build two more locomotives of the same power and size as the Ten-wheelers they'd received from Cooke. But, for some reason, these were Moguls. They looked like 4-6-0s with the rear truck axle removed..
The StL&NA was reorganized as the Missouri & Northern Arkansas in 1904, but these engines kept the same numbers until they were retired in 1929 and scrapped in 1934-1935.
Principal Dimensions by Steve Llanso of Middle Run Media | |
---|---|
Class | M-26 |
Locobase ID | 6640 |
Railroad | Saint Louis & North Arkansas |
Country | USA |
Whyte | 2-6-0 |
Number in Class | 2 |
Road Numbers | 6-7 |
Gauge | Std |
Number Built | 2 |
Builder | Burnham, Williams & Co |
Year | 1903 |
Valve Gear | Stephenson |
Locomotive Length and Weight | |
Driver Wheelbase (ft / m) | 12 / 3.66 |
Engine Wheelbase (ft / m) | 21 / 6.40 |
Ratio of driving wheelbase to overall engine wheelbase | 0.57 |
Overall Wheelbase (engine & tender) (ft / m) | 49.83 / 15.19 |
Axle Loading (Maximum Weight per Axle) (lbs / kg) | |
Weight on Drivers (lbs / kg) | 115,000 / 52,163 |
Engine Weight (lbs / kg) | 135,000 / 61,235 |
Tender Loaded Weight (lbs / kg) | 120,000 / 54,431 |
Total Engine and Tender Weight (lbs / kg) | 255,000 / 115,666 |
Tender Water Capacity (gals / ML) | 6000 / 22.73 |
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | 10 / 9 |
Minimum weight of rail (calculated) (lb/yd / kg/m) | 64 / 32 |
Geometry Relating to Tractive Effort | |
Driver Diameter (in / mm) | 56 / 1422 |
Boiler Pressure (psi / kPa) | 180 / 1240 |
High Pressure Cylinders (dia x stroke) (in / mm) | 19" x 26" / 483x660 |
Tractive Effort (lbs / kg) | 25,644 / 11631.94 |
Factor of Adhesion (Weight on Drivers/Tractive Effort) | 4.48 |
Heating Ability | |
Tubes (number - dia) (in / mm) | 283 - 2" / 51 |
Flues (number - dia) (in / mm) | |
Flue/Tube length (ft / m) | 12.23 / 3.73 |
Firebox Area (sq ft / m2) | 163.60 / 15.20 |
Grate Area (sq ft / m2) | 30.60 / 2.84 |
Evaporative Heating Surface (sq ft / m2) | 1963 / 182.37 |
Superheating Surface (sq ft / m2) | |
Combined Heating Surface (sq ft / m2) | 1963 / 182.37 |
Evaporative Heating Surface/Cylinder Volume | 230.13 |
Computations Relating to Power Output (More Information) | |
Robert LeMassena's Power Computation | 5508 |
Same as above plus superheater percentage | 5508 |
Same as above but substitute firebox area for grate area | 29,448 |
Power L1 | 5477 |
Power MT | 314.99 |