Alabama & Vicksburg 0-10-0 Locomotives of the USA

Class Details by Steve Llanso of Sweat House Media

Class G8 / 3400 (Locobase 12636)

Data from A&V-VS&P 1 - 1926 Locomotive Diagram book supplied in May 2005 by Allen Stanley. See also DeGolyer, Volume 68, pp. 107+. Works numbers were 55578 in July 1922 and 57669 in March 1924.

The A&V's Mississippi River car ferry crossed at Vicksburg, Miss, a spot first made famous for its steep bluffs during US Grant's Union siege in 1862-1863. They were no less daunting for peace-time railroading, so the A&V bought a pair of these big switchers. They had 14" (356 mm) piston valves, 36 sq ft (3.35 sq m) of arch tubes in the firebox. Baldwin agreed to install Gaines combustion walls should these engines be converted to burn coal.

Their impressive cylinder volume combined with the relatively meager heating surface area to discourage fast running even with the 58" drivers. Like other A&V locomotives of the time, these used Young valve gear (see Locobase 6082 for a description) .

By 1929, the IC had owned the A & V for three years (and renumbered the engines) and thrown a bridge across the Mississippi. So the two were transferred to the almost-new Chicago-area Markham Yard. They were converted to coal-burning in July 1934 and received new 14-ton capacity tenders.

Obviously, the IC found the type useful as it also converted the A & V's 5 K-class 2-10-2s (470-474; see Locobase 6083) to 0-10-0s in the 1930s and renumbered them 3100-3104. These trailed cylindrical Vanderbilt tenders instead of the slope-back units used on this pair.

Specifications by Steve Llanso of Sweat House Media
ClassG8 / 3400
Locobase ID12636
RailroadAlabama & Vicksburg (IC)
Number in Class2
Road Numbers430-431 / 3400-3401 / 3600-3601
Number Built2
Valve GearYoung
Locomotive Length and Weight
Driver Wheelbase20.83'
Engine Wheelbase61.40'
Ratio of driving wheelbase to overall engine wheebase 0.34
Overall Wheelbase (engine & tender)61.40'
Axle Loading (Maximum Weight per Axle)64730 lbs
Weight on Drivers303300 lbs
Engine Weight303300 lbs
Tender Light Weight154000 lbs
Total Engine and Tender Weight457300 lbs
Tender Water Capacity7000 gals
Tender Fuel Capacity (oil/coal)2900 gals
Minimum weight of rail (calculated)101 lb/yard
Geometry Relating to Tractive Effort
Driver Diameter58"
Boiler Pressure185 psi
Cylinders (dia x stroke)30" x 32"
Tractive Effort78083 lbs
Factor of Adhesion (Weight on Drivers/Tractive Effort) 3.88
Heating Ability
Firebox Area282 sq. ft
Grate Area62 sq. ft
Evaporative Heating Surface3707 sq. ft
Superheating Surface936 sq. ft
Combined Heating Surface4643 sq. ft
Evaporative Heating Surface/Cylinder Volume141.60
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation11470
Same as above plus superheater percentage13764
Same as above but substitute firebox area for grate area62604
Power L19250
Power MT336.18


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