Wabash 2-8-0 "Consolidation" Locomotives in 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 Rail Data Exchange.

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 Rail Data Exchange.

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 - 1917 Locomotive Diagrams supplied in May 2005 by Allen Stanley from his extensive Rail Data Exchange.

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. An increase in boiler pressure and the amount of superheater area implied the imparting of a good amount of supplemental energy. Although cylinder diameter increased by 1/2", their 12" (305 mm) piston valves did not change.

Principal Dimensions by Steve Llanso of Sweat House Media
ClassI1I2I3s
Locobase ID6926 6925 6924
RailroadWabashWabashWabash
CountryUSAUSAUSA
Whyte2-8-02-8-02-8-0
Number in Class21530
Road Numbers266-2672150-21662301-2330
GaugeStdStdStd
Number Built215
BuilderRhode IslandAlco-BrooksWabash
Year189519051916
Valve GearStephensonStephensonStephenson
Locomotive Length and Weight
Driver Wheelbase (ft / m)15 / 4.5716 / 4.8815.75 / 4.80
Engine Wheelbase (ft / m)22.43 / 6.8424.25 / 7.3924.50 / 7.47
Ratio of driving wheelbase to overall engine wheebase 0.67 0.66 0.64
Overall Wheelbase (engine & tender) (ft / m)52.25 / 15.9357.87 / 17.64
Axle Loading (Maximum Weight per Axle) (lbs / kg)42,000 / 19,05152,450 / 23,791
Weight on Drivers (lbs / kg)119,000 / 53,978154,500 / 70,080198,500 / 90,038
Engine Weight (lbs / kg)132,000 / 59,874174,500 / 79,152224,100 / 101,650
Tender Loaded Weight (lbs / kg)77,000 / 34,927110,000 / 49,895154,000 / 69,853
Total Engine and Tender Weight (lbs / kg)209,000 / 94,801284,500 / 129,047378,100 / 171,503
Tender Water Capacity (gals / ML)5000 / 18.945000 / 18.948000 / 30.30
Tender Fuel Capacity (oil/coal) (gals/tons / ML/MT)12 / 10.90
Minimum weight of rail (calculated) (lb/yd / kg/m)50 / 2564 / 3283 / 41.50
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)50 / 127058 / 147358 / 1473
Boiler Pressure (psi / kPa)185 / 12.80200 / 13.80210 / 14.50
High Pressure Cylinders (dia x stroke) (in / mm)20" x 24" / 508x61019.5" x 28" / 495x71122.5" x 30" / 572x762
Tractive Effort (lbs / kg)30,192 / 13694.8831,207 / 14155.2746,741 / 21201.39
Factor of Adhesion (Weight on Drivers/Tractive Effort) 3.94 4.95 4.25
Heating Ability
Firebox Area (sq ft / m2)157 / 14.59182.50 / 16.96214 / 19.89
Grate Area (sq ft / m2)24 / 2.2344 / 4.0950.50 / 4.69
Evaporative Heating Surface (sq ft / m2)1892 / 175.842393 / 222.402683 / 249.35
Superheating Surface (sq ft / m2)606 / 56.32
Combined Heating Surface (sq ft / m2)1892 / 175.842393 / 222.403289 / 305.67
Evaporative Heating Surface/Cylinder Volume216.81247.25194.34
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation4440880010,605
Same as above plus superheater percentage4440880012,514
Same as above but substitute firebox area for grate area29,04536,50053,029
Power L14729660313,538
Power MT350.44376.88601.43

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