Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University Volume 38, p. 235. Works numbers were 36817-36820 in August 1911.
ARMC was a wholly owned subsidiary of the Pittsburg, Shawmut & Northern. Its previous business with Baldwin had concerned the purchase of 4-wheel, 100-hp electric switchers in 1909-1910 (works numbers 34124-34130 in December 1909 and 34171-34173 in January 1910). Apparently needing some road engines, the Brookville, Pa company duplicated parent PS & N's H-4 Consolidation design (Locobase 12779). Perhaps the only difference was the use of a cylindrical tender of the same capacity, but weighing 10,000 lb less.
Three of the four were scrapped bearing the ARMC herald: 229 in November 1938, 228 in December 1940, and 227 in November 1942. ARMC sold the 226 to the PS & N in 1944 as their 76.
| Principal Dimensions by Steve Llanso of Middle Run Media | |
|---|---|
| Class | H |
| Locobase ID | 13793 |
| Railroad | Allegheny River Mining Company |
| Country | USA |
| Whyte | 2-8-0 |
| Number in Class | 4 |
| Road Numbers | 226-229, 200-201 |
| Gauge | Std |
| Number Built | 4 |
| Builder | Baldwin |
| Year | 1911 |
| Valve Gear | Walschaert |
| Locomotive Length and Weight | |
| Driver Wheelbase (ft / m) | 14.50 / 4.42 |
| Engine Wheelbase (ft / m) | 23 / 7.01 |
| Ratio of driving wheelbase to overall engine wheelbase | 0.63 |
| Overall Wheelbase (engine & tender) (ft / m) | |
| Axle Loading (Maximum Weight per Axle) (lbs / kg) | |
| Weight on Drivers (lbs / kg) | 180,000 / 81,647 |
| Engine Weight (lbs / kg) | 196,000 / 88,904 |
| Tender Loaded Weight (lbs / kg) | 130,000 / 63,503 |
| Total Engine and Tender Weight (lbs / kg) | 326,000 / 152,407 |
| Tender Water Capacity (gals / ML) | 7000 / 26.52 |
| Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | 14 / 13 |
| Minimum weight of rail (calculated) (lb/yd / kg/m) | 75 / 37.50 |
| Geometry Relating to Tractive Effort | |
| Driver Diameter (in / mm) | 51 / 1295 |
| Boiler Pressure (psi / kPa) | 200 / 1380 |
| High Pressure Cylinders (dia x stroke) (in / mm) | 22" x 28" / 559x711 |
| Tractive Effort (lbs / kg) | 45,173 / 20490.15 |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 3.98 |
| Heating Ability | |
| Tubes (number - dia) (in / mm) | 381 - 2" / 51 |
| Flues (number - dia) (in / mm) | |
| Flue/Tube length (ft / m) | 14.75 / 4.50 |
| Firebox Area (sq ft / m2) | 177 / 16.44 |
| Grate Area (sq ft / m2) | 57 / 5.30 |
| Evaporative Heating Surface (sq ft / m2) | 3102 / 288.18 |
| Superheating Surface (sq ft / m2) | |
| Combined Heating Surface (sq ft / m2) | 3102 / 288.18 |
| Evaporative Heating Surface/Cylinder Volume | 251.79 |
| Computations Relating to Power Output (More Information) | |
| Robert LeMassena's Power Computation | 11,400 |
| Same as above plus superheater percentage | 11,400 |
| Same as above but substitute firebox area for grate area | 35,400 |
| Power L1 | 5502 |
| Power MT | 269.55 |