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 14,098
RailroadCentral Vermont (CNR)Central Vermont (CNR)
Number in Class45
Road Numbers230-233230-233 /
Number Built45
Valve GearWalschaertStephenson
Locomotive Length and Weight
Driver Wheelbase (ft)13.3313.33
Engine Wheelbase (ft)33.1733.17
Ratio of driving wheelbase to overall engine wheebase 0.40 0.40
Overall Wheelbase (engine & tender) (ft)64.2162.29
Axle Loading (Maximum Weight per Axle) (lbs)
Weight on Drivers (lbs)158,800139,000
Engine Weight (lbs)240,880210,000
Tender Loaded Weight (lbs)157,000143,300
Total Engine and Tender Weight (lbs)397,880353,300
Tender Water Capacity (gals)80007000
Tender Fuel Capacity (oil/coal) (gals/tons)1010
Minimum weight of rail (calculated) (lb/yd)8877
Geometry Relating to Tractive Effort
Driver Diameter (in)7373
Boiler Pressure (psi)195200
High Pressure Cylinders (dia x stroke) (in)23" x 28"22" x 28"
Tractive Effort (lbs)33,63131,559
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.72 4.40
Heating Ability
Firebox Area (sq ft)181170
Grate Area (sq ft)50.6250.60
Evaporative Heating Surface (sq ft)27543444
Superheating Surface (sq ft)626
Combined Heating Surface (sq ft)33803444
Evaporative Heating Surface/Cylinder Volume204.54279.57
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation987110,120
Same as above plus superheater percentage11,74610,120
Same as above but substitute firebox area for grate area42,00134,000
Power L116,3758482
Power MT682.00403.59



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