Allegheny River Mining Company 2-8-0 "Consolidation" Locomotives in the USA

Class Details by Steve Llanso of Sweat House Media

Class H (Locobase 13793)

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 Sweat House Media
Locobase ID13,793
RailroadAllegheny River Mining Company
Number in Class4
Road Numbers226-229, 200-201
Number Built4
Valve GearWalschaert
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 wheebase 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 / ML/MT)14 / 12.70
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 / 13.80
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
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 Volume251.80
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation11,400
Same as above plus superheater percentage11,400
Same as above but substitute firebox area for grate area35,400
Power L15502
Power MT269.55

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