Central Vermont 4-4-0 "American" Locomotives of the USA

Class Details by Steve Llanso of Sweat House Media

Class B-16-a (Locobase 15639)

Data from http://www.proto87.org/ca/loco/621-622.html (19 June 2003), Rene Gourley's website describing this Eastern Canadian railway. See also Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University, Volume 18, p. 259. Works numbers were 13699-13700 in August 1893 13991-13992 in April 1894, and 14296 in October 1895.

The specifications featured on the proto87 website indicated that the 20's design had arch tubes. (The fire bricks are to rest on water tubes "as on Canada Atl 12", but the specs caution, the tubes "not to enter the crown sheet". )

When the O A & PS was absorbed by the Canada Atlantic, this pair was renumbered, and the two locomotives were renumbered once again by the Grand Trunk when that road fully amalgamated the CA in 1914.

According to a Locomotive and Railroad History Bulletin (147) cited in proto87, the two engines then had dimensions of 18" x 26", but the calculation suggests that the LRHS was not correct.

NB:The heating surface areas are good estimates derived from a comparison with the #21 of the Matanzas Railroad of Cuba delivered in 1903 and described in Locobase 11540. Not only did both have the same number of identical-diameter boiler tubes running the same length (less 1/2 inch), they also had grates and fireboxes that measured identically to the quarter-inch.

Specifications by Steve Llanso of Sweat House Media
Locobase ID15639
RailroadCentral Vermont (CNR)
Number in Class5
Road Numbers20-21 / 621-622 / 304-305
Number Built5
BuilderBurnham, Williams & Co
Valve GearStephenson
Locomotive Length and Weight
Driver Wheelbase 8.75'
Engine Wheelbase22.83'
Ratio of driving wheelbase to overall engine wheebase 0.38
Overall Wheelbase (engine & tender)
Axle Loading (Maximum Weight per Axle)
Weight on Drivers64000 lbs
Engine Weight100000 lbs
Tender Light Weight
Total Engine and Tender Weight
Tender Water Capacity3500 gals
Tender Fuel Capacity (oil/coal)8 tons
Minimum weight of rail (calculated)53 lb/yard
Geometry Relating to Tractive Effort
Driver Diameter69"
Boiler Pressure180 psi
Cylinders (dia x stroke)18" x 24"
Tractive Effort17242 lbs
Factor of Adhesion (Weight on Drivers/Tractive Effort) 3.71
Heating Ability
Firebox Area140 sq. ft
Grate Area17.50 sq. ft
Evaporative Heating Surface1520 sq. ft
Superheating Surface
Combined Heating Surface1520 sq. ft
Evaporative Heating Surface/Cylinder Volume215.04
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation3150
Same as above plus superheater percentage3150
Same as above but substitute firebox area for grate area25200
Power L16501
Power MT447.88


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