Virginian 2-6-6-6 "Allegheny" Locomotives of the USA

Class Details by Steve Llanso of Sweat House Media

Class AG (Locobase 421)

Data from 1951 Virginian locomotive diagram book supplied in May 2005 by Allen Stanley from his extensive Raildata collection. Works numbers were 8859 in March 1945, 8860-8863 in April, 8864-8865 in May, and 8866 in June.

Similar to C&O's H-8 class Alleghenies, but not as well known. Arrangement name on the VGN was "Blue Ridge". They had smaller sand domes than the H-8s and raised tender decks.

Bob Quehl ( from Pittsburgh, PA writing in the Worldrailfans group in 2000 ( Feb 4 2000, 4:06), tells us this about the Virginian's view of the AGs they were about to get in 1945:

"Apparently it became known by some senior managers at the C&O that the engines were considerably overweight. They did not start to raise questions as there was a cover-up attempt by C&O and Lima, until the neighboring Virginian Rail Road ordered their own Alleghenies. The president of the Virginian, one Frank Beale, was a former high level person in the C&O and knew what the H-8 was supposed to weigh. When he got the specifications from Lima for the Virginian's engines, he could not understand why they weighed considerably more and one thing led to another. The Virginian had a lot of trouble getting their eight Alleghenies delivered as the surrounding rail roads did not want that much weight on their rails."

Note that total engine weight on the 1942 Alleghenies was more than 18,000 pounds higher than on the AGs. The C & O's 1948 Alleghenies (Locobase 11065) were copies of these VGN 2-6-6-6s.

Scrapped in 1960.

Specifications by Steve Llanso of Sweat House Media
Locobase ID421
RailroadVirginian (VGN)
Number in Class8
Road Numbers900-907
Number Built8
Valve GearBaker
Locomotive Length and Weight
Driver Wheelbase (ft)11.83
Engine Wheelbase (ft)62.50
Ratio of driving wheelbase to overall engine wheebase 0.19
Overall Wheelbase (engine & tender) (ft)112.92
Axle Loading (Maximum Weight per Axle) (lbs)82,500
Weight on Drivers (lbs)495,000
Engine Weight (lbs)753,000
Tender Loaded Weight (lbs)442,000
Total Engine and Tender Weight (lbs)1,195,000
Tender Water Capacity (gals)26,500
Tender Fuel Capacity (oil/coal) (gals/tons)25
Minimum weight of rail (calculated) (lb/yd)138
Geometry Relating to Tractive Effort
Driver Diameter (in)67
Boiler Pressure (psi)260
High Pressure Cylinders (dia x stroke) (in)22.5" x 33" (4)
Tractive Effort (lbs)110,211
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.49
Heating Ability
Firebox Area (sq ft)600
Grate Area (sq ft)135.30
Evaporative Heating Surface (sq ft)6795
Superheating Surface (sq ft)2922
Combined Heating Surface (sq ft)9717
Evaporative Heating Surface/Cylinder Volume223.72
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation35,178
Same as above plus superheater percentage45,731
Same as above but substitute firebox area for grate area202,800
Power L134,501
Power MT921.96

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