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

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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 Rail Data Exchange. 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)
CountryUSAUSA
Whyte4-6-24-6-2
Number in Class45
Road Numbers230-233230-233 /
GaugeStdStd
Number Built45
BuilderCVBaldwin
Year1910
Valve GearWalschaertStephenson
Locomotive Length and Weight
Driver Wheelbase (ft / m)13.33 / 4.0613.33 / 4.06
Engine Wheelbase (ft / m)33.17 / 10.1133.17 / 10.11
Ratio of driving wheelbase to overall engine wheebase 0.40 0.40
Overall Wheelbase (engine & tender) (ft / m)64.21 / 19.5762.29 / 18.99
Axle Loading (Maximum Weight per Axle) (lbs / kg)
Weight on Drivers (lbs / kg)158,800 / 72,031139,000 / 63,049
Engine Weight (lbs / kg)240,880 / 109,261210,000 / 95,255
Tender Loaded Weight (lbs / kg)157,000 / 71,214143,300 / 65,000
Total Engine and Tender Weight (lbs / kg)397,880 / 180,475353,300 / 160,255
Tender Water Capacity (gals / ML)8000 / 30.307000 / 26.52
Tender Fuel Capacity (oil/coal) (gals/tons / ML/MT)10 / 9.1010 / 9.10
Minimum weight of rail (calculated) (lb/yd)8877
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)73 / 185473 / 1854
Boiler Pressure (psi / kPa)195 / 13.40200 / 13.80
High Pressure Cylinders (dia x stroke) (in / mm)23" x 28" / 584x71122" x 28" / 559x711
Tractive Effort (lbs / kg)33,631 / 15254.7831,559 / 14314.94
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.72 4.40
Heating Ability
Firebox Area (sq ft / m2)181 / 16.82170 / 15.79
Grate Area (sq ft / m2)50.62 / 4.7050.60 / 4.70
Evaporative Heating Surface (sq ft / m2)2754 / 255.953444 / 319.96
Superheating Surface (sq ft / m2)626 / 58.18
Combined Heating Surface (sq ft / m2)3380 / 314.133444 / 319.96
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

Photos

Reference