Central Railroad of Pennsylvania 4-8-0 "Mastodon" Locomotives of the USA

Class Details by Steve Llanso of Sweat House Media

Class 4 (Locobase 11137)

Data from Schenectady Locomotive Works, Illustrated Catalogue of Simple and Compound Locomotives (Philadelphia: J B Lippincott, 1897), pp. 113-117.

Specifications by Steve Llanso of Sweat House Media
Locobase ID11137
RailroadCentral Railroad of Pennsylvania
Number in Class1
Road Numbers4
Number Built1
Valve GearStephenson
Locomotive Length and Weight
Driver Wheelbase14.92'
Engine Wheelbase24.92'
Ratio of driving wheelbase to overall engine wheebase 0.60
Overall Wheelbase (engine & tender)48.92'
Axle Loading (Maximum Weight per Axle)
Weight on Drivers111700 lbs
Engine Weight135700 lbs
Tender Light Weight
Total Engine and Tender Weight
Tender Water Capacity3550 gals
Tender Fuel Capacity (oil/coal)
Minimum weight of rail (calculated)47 lb/yard
Geometry Relating to Tractive Effort
Driver Diameter57"
Boiler Pressure160 psi
Cylinders (dia x stroke)20" x 26"
Tractive Effort24814 lbs
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.50
Heating Ability
Firebox Area147.50 sq. ft
Grate Area31.30 sq. ft
Evaporative Heating Surface1947 sq. ft
Superheating Surface
Combined Heating Surface1947 sq. ft
Evaporative Heating Surface/Cylinder Volume205.95
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation5008
Same as above plus superheater percentage5008
Same as above but substitute firebox area for grate area23600
Power L14316
Power MT340.74

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