Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University, Volume 52, p. 393. Works numbers were 37914 in June 1912 and 43057 in March 1916.
The second Mikado was named the D F Andrews and its specification anticipated an adhesion weight of 137, 500 lb and total engine weight of 176,000 lb. The specs made a special point of saying: "Loco. is intended for the very hardest kind of service and the greatest care should be exercised in looking after the details of design and manufacture."
After more than 35 years in service on the P & N, the 17 went to the Arkansas Railroad sometime after November 1951. According to Gene Connelly's master list of Baldwin locomotives, however, it was never relettered for the AR.
Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University, Volume 52, p. 391. Works number was 41381 in May 1914.
Bought by Ozan-Graysonia Lumber for the P & N, the 16 was smaller, lighter, and less powerful than the 15 that had gone into service a couple of years before. The specs described the line as having a maximum 5% grade, curves as sharp as 30 degrees in radius on 56-lb/yard (28-kg/metre) rail.
The 16 served both for about 20 years before being sold to the Union Saw Mill in November 1936. Sometime later the engine wound up on the Louisiana & Pine Bluff.
Principal Dimensions by Steve Llanso of Middle Run Media | ||
---|---|---|
Class | 15 | R F Smith |
Locobase ID | 13927 | 13929 |
Railroad | Prescott & Northwestern | Prescott & Northwestern |
Country | USA | USA |
Whyte | 2-8-2 | 2-8-2 |
Number in Class | 2 | 1 |
Road Numbers | 15, 17 | 16 |
Gauge | Std | Std |
Number Built | 2 | 1 |
Builder | Baldwin | Baldwin |
Year | 1912 | 1914 |
Valve Gear | Walschaert | Walschaert |
Locomotive Length and Weight | ||
Driver Wheelbase (ft / m) | 13.08 / 3.99 | 12.08 / 3.68 |
Engine Wheelbase (ft / m) | 27 / 8.23 | 27.30 / 8.32 |
Ratio of driving wheelbase to overall engine wheelbase | 0.48 | 0.44 |
Overall Wheelbase (engine & tender) (ft / m) | 57.12 / 17.41 | 51.46 / 15.69 |
Axle Loading (Maximum Weight per Axle) (lbs / kg) | ||
Weight on Drivers (lbs / kg) | 134,000 / 60,781 | 111,000 / 50,349 |
Engine Weight (lbs / kg) | 173,000 / 78,472 | 136,000 / 61,689 |
Tender Loaded Weight (lbs / kg) | 110,000 / 49,895 | 80,000 / 36,287 |
Total Engine and Tender Weight (lbs / kg) | 283,000 / 128,367 | 216,000 / 97,976 |
Tender Water Capacity (gals / ML) | 5500 / 20.83 | 4000 / 15.15 |
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | 6 / 6 | 7 / 6 |
Minimum weight of rail (calculated) (lb/yd / kg/m) | 56 / 28 | 46 / 23 |
Geometry Relating to Tractive Effort | ||
Driver Diameter (in / mm) | 48 / 1219 | 44 / 1118 |
Boiler Pressure (psi / kPa) | 160 / 1100 | 180 / 1240 |
High Pressure Cylinders (dia x stroke) (in / mm) | 20.5" x 28" / 521x711 | 18" x 24" / 457x610 |
Tractive Effort (lbs / kg) | 33,340 / 15122.79 | 27,039 / 12264.70 |
Factor of Adhesion (Weight on Drivers/Tractive Effort) | 4.02 | 4.11 |
Heating Ability | ||
Tubes (number - dia) (in / mm) | 350 - 2" / 51 | 263 - 2" / 51 |
Flues (number - dia) (in / mm) | ||
Flue/Tube length (ft / m) | 16.50 / 5.03 | 13 / 3.96 |
Firebox Area (sq ft / m2) | 158 / 14.68 | 140 / 13.01 |
Grate Area (sq ft / m2) | 41.30 / 3.84 | 25.50 / 2.37 |
Evaporative Heating Surface (sq ft / m2) | 3166 / 294.13 | 1918 / 178.19 |
Superheating Surface (sq ft / m2) | ||
Combined Heating Surface (sq ft / m2) | 3166 / 294.13 | 1918 / 178.19 |
Evaporative Heating Surface/Cylinder Volume | 295.89 | 271.29 |
Computations Relating to Power Output (More Information) | ||
Robert LeMassena's Power Computation | 6608 | 4590 |
Same as above plus superheater percentage | 6608 | 4590 |
Same as above but substitute firebox area for grate area | 25,280 | 25,200 |
Power L1 | 4732 | 4888 |
Power MT | 311.41 | 388.33 |