Wabash 2-8-0 "Consolidation" Locomotives of the USA

Class Details by Steve Llanso of Sweat House Media

Class I1 (Locobase 6926)

Data from WAB 1 - 1907 Locomotive Diagrams supplied in May 2005 by Allen Stanley from his extensive Raildata collection.

The driver diameter was later increased to 52". Although the pair was still in service in 1917, they had been retired by 1929.

Class I2 (Locobase 6925)

Data from WAB 1 - 1917 Locomotive Diagrams supplied in May 2005 by Allen Stanley from his extensive Raildata collection.

Drury (1993) says these were originally built for the Detroit, Toledo & Ironton and sold to the Wabash in 1910-1911. He notes that the DT & I ordered a slew of Consolidations in 1905 but defaulted on the payments. The Wabash purchased 15 of them.

Unlike the I-3s, this class was not superheated. Their firebox heating surface did include 4 arch tubes measuring 26.5 sq ft in all.

Class I3s (Locobase 6924)

Data from WAB 1 - 1929 Locomotive Diagrams supplied in May 2005 by Allen Stanley from his extensive Raildata collection.

When the Wabash superheated these Consolidations (see Locobase 5698 for the original layout), they didn't gain much power at speed. But, then, since they were short-haul, drag-freight engines that might not have been the point. As it was, Locobase suspects that fuel economy was the principal goal and that was most likely realized.

Specifications by Steve Llanso of Sweat House Media
Locobase ID6926 6925 6924
Number in Class21530
Road Numbers266-2672150-21662301-2330
Number Built215
BuilderRhode IslandAlco-BrooksWabash
Valve GearStephensonStephensonStephenson
Locomotive Length and Weight
Driver Wheelbase15'16'15.75'
Engine Wheelbase22.43'24.25'24.50'
Ratio of driving wheelbase to overall engine wheebase 0.67 0.66 0.64
Overall Wheelbase (engine & tender)52.25'57.87'
Axle Loading (Maximum Weight per Axle)42000 lbs52450 lbs
Weight on Drivers119000 lbs154500 lbs198500 lbs
Engine Weight132000 lbs174500 lbs224100 lbs
Tender Light Weight77000 lbs110000 lbs154000 lbs
Total Engine and Tender Weight209000 lbs284500 lbs378100 lbs
Tender Water Capacity5000 gals5000 gals8000 gals
Tender Fuel Capacity (oil/coal)12 tons tons
Minimum weight of rail (calculated)50 lb/yard64 lb/yard83 lb/yard
Geometry Relating to Tractive Effort
Driver Diameter50"58"58"
Boiler Pressure185 psi200 psi210 psi
Cylinders (dia x stroke)20" x 24"19.5" x 28"22.5" x 30"
Tractive Effort30192 lbs31207 lbs46741 lbs
Factor of Adhesion (Weight on Drivers/Tractive Effort) 3.94 4.95 4.25
Heating Ability
Firebox Area157 sq. ft182.50 sq. ft214 sq. ft
Grate Area24 sq. ft44 sq. ft50.50 sq. ft
Evaporative Heating Surface1892 sq. ft2393 sq. ft2683 sq. ft
Superheating Surface606 sq. ft
Combined Heating Surface1892 sq. ft2393 sq. ft3289 sq. ft
Evaporative Heating Surface/Cylinder Volume216.81247.25194.34
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation4440880010605
Same as above plus superheater percentage4440880012514
Same as above but substitute firebox area for grate area290453650053029
Power L14729660313538
Power MT350.44376.88601.43


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