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 ID15,639
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 (ft) 8.75
Engine Wheelbase (ft)22.83
Ratio of driving wheelbase to overall engine wheebase 0.38
Overall Wheelbase (engine & tender) (ft)
Axle Loading (Maximum Weight per Axle) (lbs)
Weight on Drivers (lbs)64,000
Engine Weight (lbs)100,000
Tender Loaded Weight (lbs)
Total Engine and Tender Weight (lbs)
Tender Water Capacity (gals)3500
Tender Fuel Capacity (oil/coal) (gals/tons)8
Minimum weight of rail (calculated) (lb/yd)53
Geometry Relating to Tractive Effort
Driver Diameter (in)69
Boiler Pressure (psi)180
High Pressure Cylinders (dia x stroke) (in)18" x 24"
Tractive Effort (lbs)17,242
Factor of Adhesion (Weight on Drivers/Tractive Effort) 3.71
Heating Ability
Firebox Area (sq ft)140
Grate Area (sq ft)17.50
Evaporative Heating Surface (sq ft)1520
Superheating Surface (sq ft)
Combined Heating Surface (sq ft)1520
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 area25,200
Power L16501
Power MT447.88


If you have any railroad data such as diagram books, rail station plans or anything else that you would be willing to share, please contact us.