Virginian 4-6-2 "Pacific" Locomotives of the USA

Class Details by Steve Llanso of Sweat House Media

Class PA (Locobase 174)

Data from VGN 8 - 1951 Locomotive Diagrams supplied in May 2005 by Allen Stanley from his extensive Raildata collection. Works numbers were 61992-61996 in September 1920, 61997 in October.

Note the low drivers on this mountain-climbing Pacific. Like the TA Ten-wheelers, these were built by Richmond in a single batch

Boilers originally pressed at 190 psi. Fitted with Duplex stokers. EW King, Jr (in Drury, 1993) says another distinguishing feature was "their two cross-compound air pumps under the left running board." Another was the relatively generous 14" piston valves.

Specifications by Steve Llanso of Sweat House Media
Locobase ID174
RailroadVirginian (VGN)
Number in Class6
Road Numbers210-215
Number Built6
Valve GearBaker
Locomotive Length and Weight
Driver Wheelbase12.17'
Engine Wheelbase34.75'
Ratio of driving wheelbase to overall engine wheebase 0.35
Overall Wheelbase (engine & tender)70.60'
Axle Loading (Maximum Weight per Axle)63800 lbs
Weight on Drivers189000 lbs
Engine Weight298000 lbs
Tender Light Weight188100 lbs
Total Engine and Tender Weight486100 lbs
Tender Water Capacity10500 gals
Tender Fuel Capacity (oil/coal)14 tons
Minimum weight of rail (calculated)105 lb/yard
Geometry Relating to Tractive Effort
Driver Diameter69"
Boiler Pressure200 psi
Cylinders (dia x stroke)26" x 28"
Tractive Effort46634 lbs
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.05
Heating Ability
Firebox Area293 sq. ft
Grate Area66.70 sq. ft
Evaporative Heating Surface3414 sq. ft
Superheating Surface905 sq. ft
Combined Heating Surface4319 sq. ft
Evaporative Heating Surface/Cylinder Volume198.42
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation13340
Same as above plus superheater percentage16141
Same as above but substitute firebox area for grate area70906
Power L117410
Power MT609.24

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.