Central Vermont 4-6-2 "Pacific" Locomotives of the USA

Class Details by Steve Llanso of Sweat House Media

Class K-3b (Locobase 7097)

Data from CV 1957 Locomotive Diagrams supplied in May 2005 by Allen Stanley from his extensive Raildata collection. See also DeGolyer, Vol 47, pp. 137. Works numbers were 37560-37563 in March 1912.

Modified from the four saturated-boiler Pacifics delivered by Baldwin to the CV in 1912, this class was superheated along the same lines as other classes. The #289 was later transferred to the CN when the CV determined that three passenger Pacifics would suffice for their independent requirements. Those three were scrapped in March 1952 (230, 232) and 1954.

Class P4 / K-3-b (Locobase 14098)

Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University, Volume 47, p. 135. Works numbers were 37560-37563 in March 1912.

These were duplicates of the GTR/Baldwin octet that was delivered to the Grand Trunk in 1910 (Locobase 14096). See Locobase 14098 for these engines upgraded with superheaters.

Specifications by Steve Llanso of Sweat House Media
ClassK-3bP4 / K-3-b
Locobase ID7097 14098
RailroadCentral Vermont (CNR)Central Vermont (CNR)
Number in Class45
Road Numbers230-233230-233 /
Number Built45
Valve GearWalschaertStephenson
Locomotive Length and Weight
Driver Wheelbase13.33'13.33'
Engine Wheelbase33.17'33.17'
Ratio of driving wheelbase to overall engine wheebase 0.40 0.40
Overall Wheelbase (engine & tender)64.21'62.29'
Axle Loading (Maximum Weight per Axle)
Weight on Drivers158800 lbs139000 lbs
Engine Weight240880 lbs210000 lbs
Tender Light Weight157000 lbs143300 lbs
Total Engine and Tender Weight397880 lbs353300 lbs
Tender Water Capacity8000 gals7000 gals
Tender Fuel Capacity (oil/coal)10 tons10 tons
Minimum weight of rail (calculated)88 lb/yard77 lb/yard
Geometry Relating to Tractive Effort
Driver Diameter73"73"
Boiler Pressure195 psi200 psi
Cylinders (dia x stroke)23" x 28"22" x 28"
Tractive Effort33631 lbs31559 lbs
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.72 4.40
Heating Ability
Firebox Area181 sq. ft170 sq. ft
Grate Area50.62 sq. ft50.60 sq. ft
Evaporative Heating Surface2754 sq. ft3444 sq. ft
Superheating Surface626 sq. ft
Combined Heating Surface3380 sq. ft3444 sq. ft
Evaporative Heating Surface/Cylinder Volume204.54279.57
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation987110120
Same as above plus superheater percentage1174610120
Same as above but substitute firebox area for grate area4200134000
Power L1163758482
Power MT682.00403.59



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