Monongahela 2-8-0 "Consolidation" Locomotives of the USA


Class Details by Steve Llanso of Sweat House Media

Class H5 (Locobase 7062)

Data from MNGHLA 12 - 1949 Locomotive Diagrams supplied in May 2005 by Allen Stanley from his extensive Raildata collection.

One diagram notes that those H5s fitted with thermic syphons add 50 sq ft (4.65 sq m) to the firebox heating surface. That is the version shown in the specs, which also show twelve fewer boiler tubes as a result.

Engine 119 was fitted with a superheater that contributed 570 sq ft (52.95 sq m) to the total heating surface of 2 ,905 sq ft (269.9 sq m). To house the 30 5 3/8" superheater flues, the boiler lost 167 2" tubes. See H5SA (Locobase 7063) for the as-built superheated version of this class.


Class H5SA (Locobase 7063)

Data from MNGHLA 12 - 1949 Locomotive Diagrams supplied in May 2005 by Allen Stanley from his extensive Raildata collection.

Twelve of these superheated Consolidations came from the Pittsburgh Locomotive Works (builder's numbers 55834-55839 and 58658-58663); Porter supplied the 13th (its number 6848).

Specifications by Steve Llanso of Sweat House Media
ClassH5H5SA
Locobase ID7062 7063
RailroadMonongahelaMonongahela
CountryUSAUSA
Whyte2-8-02-8-0
Number in Class2613
Road Numbers115-140141-153
GaugeStdStd
Number Built2613
BuilderAlco-PittsburghAlco-Pittsburgh
Year19091916
Valve GearBakerBaker
Locomotive Length and Weight
Driver Wheelbase14.25'14.25'
Engine Wheelbase23.17'23.50'
Ratio of driving wheelbase to overall engine wheebase 0.62 0.61
Overall Wheelbase (engine & tender)63.67'58.25'
Axle Loading (Maximum Weight per Axle)45600 lbs47050 lbs
Weight on Drivers170300 lbs178340 lbs
Engine Weight193600 lbs201390 lbs
Tender Light Weight138000 lbs150000 lbs
Total Engine and Tender Weight331600 lbs351390 lbs
Tender Water Capacity7000 gals8500 gals
Tender Fuel Capacity (oil/coal)14 tons17 tons
Minimum weight of rail (calculated)71 lb/yard74 lb/yard
Geometry Relating to Tractive Effort
Driver Diameter51"51"
Boiler Pressure200 psi200 psi
Cylinders (dia x stroke)21" x 30"22.5" x 30"
Tractive Effort44100 lbs50625 lbs
Factor of Adhesion (Weight on Drivers/Tractive Effort) 3.86 3.52
Heating Ability
Firebox Area239 sq. ft166 sq. ft
Grate Area51.70 sq. ft51.70 sq. ft
Evaporative Heating Surface3029 sq. ft2335 sq. ft
Superheating Surface570 sq. ft
Combined Heating Surface3029 sq. ft2905 sq. ft
Evaporative Heating Surface/Cylinder Volume251.86169.13
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation1034010340
Same as above plus superheater percentage1034012408
Same as above but substitute firebox area for grate area4780039840
Power L1597110214
Power MT309.19505.06


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