Blanchard & Twitchell 2-4-2 "Columbian" Locomotives of the USA

Class Details by Steve Llanso of Sweat House Media

Class Success (Locobase 12072)

Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University Vol 18, p. 236,. Works number was 13610 in July 1893.

This was either a relatively large tank or a standard 4-4-0 with its auxiliary trucks relocated to allow easier movement in either direction. The railroad -- also known as the Success Pond Railroad -- was based in Mason, Maine, but remianed open for only 5 years. When the B & T closed in 1900, the 2 went to Buffalo Union Furnace Company of Buffalo, New York.

Specifications by Steve Llanso of Sweat House Media
Locobase ID12,072
RailroadBlanchard & Twitchell
Number in Class1
Road Numbers2
Number Built1
BuilderBurnham, Williams & Co
Valve GearStephenson
Locomotive Length and Weight
Driver Wheelbase (ft) 7.50
Engine Wheelbase (ft)24.67
Ratio of driving wheelbase to overall engine wheebase 0.30
Overall Wheelbase (engine & tender) (ft)24.67
Axle Loading (Maximum Weight per Axle) (lbs)
Weight on Drivers (lbs)68,000
Engine Weight (lbs)100,000
Tender Loaded Weight (lbs)
Total Engine and Tender Weight (lbs)100,000
Tender Water Capacity (gals)1800
Tender Fuel Capacity (oil/coal) (gals/tons)
Minimum weight of rail (calculated) (lb/yd)57
Geometry Relating to Tractive Effort
Driver Diameter (in)46
Boiler Pressure (psi)140
High Pressure Cylinders (dia x stroke) (in)17" x 24"
Tractive Effort (lbs)17,943
Factor of Adhesion (Weight on Drivers/Tractive Effort) 3.79
Heating Ability
Firebox Area (sq ft)104.60
Grate Area (sq ft)17.10
Evaporative Heating Surface (sq ft)1271
Superheating Surface (sq ft)
Combined Heating Surface (sq ft)1271
Evaporative Heating Surface/Cylinder Volume201.59
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation2394
Same as above plus superheater percentage2394
Same as above but substitute firebox area for grate area14,644
Power L13054
Power MT198.03

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