Old Colony 4-4-0 "American" Locomotives of the USA


Class Details by Steve Llanso of Sweat House Media

Class 256 / C-2 (Locobase 14734)

Data from James Dredge, A Record of the Transportation Exhibits at the World's Columbian Exposition of 1893 (New York: John Wiley & Sons, 1894), pp. 241+.

It's not clear why Old Colony Railroad thought it necessary to send this engine to the 1893 Columbian Exposition in Chicago. It wasn't unusual in its size or capability--hundreds, even thousands like it were in service across North America. So we can view it as representative of one of the most widely distributed designs in the steam locomotive era--a North American Eight-wheeler.

The engine was shown just as the New York, New Haven and Hartford Railroad took out a 99-year lease on the entire system of 617 route miles (993 km) throughout eastern Massachusetts. As a result, the New Haven completed its shore route between New York City and Boston.

At that point, the 256 and several of her sisters were lumped together with a variety of other acquisitions as class C-2. Of that variegated class, approximately twenty had been built in the Old Colony's shops.

Specifications by Steve Llanso of Sweat House Media
Class256 / C-2
Locobase ID14734
RailroadOld Colony (New Haven)
CountryUSA
Whyte4-4-0
Number in Class1
Road Numbers256
GaugeStd
Number Built1
BuilderOld Colony
Year1893
Valve GearStephenson
Locomotive Length and Weight
Driver Wheelbase9'
Engine Wheelbase23.50'
Ratio of driving wheelbase to overall engine wheebase 0.38
Overall Wheelbase (engine & tender)46.21'
Axle Loading (Maximum Weight per Axle)0
Weight on Drivers64000 lbs
Engine Weight99000 lbs
Tender Light Weight67000 lbs
Total Engine and Tender Weight166000 lbs
Tender Water Capacity
Tender Fuel Capacity (oil/coal)
Minimum weight of rail (calculated)53 lb/yard
Geometry Relating to Tractive Effort
Driver Diameter69"
Boiler Pressure160 psi
Cylinders (dia x stroke)18" x 24"
Tractive Effort15327 lbs
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.18
Heating Ability
Firebox Area138 sq. ft
Grate Area19.25 sq. ft
Evaporative Heating Surface1373 sq. ft
Superheating Surface0
Combined Heating Surface1373 sq. ft
Evaporative Heating Surface/Cylinder Volume194.24
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation3080
Same as above plus superheater percentage3080
Same as above but substitute firebox area for grate area22080
Power L15370
Power MT369.96


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