Wabash, St Louis & Pacific 4-6-0 "Ten-wheeler" Locomotives of the USA

Class Details by Steve Llanso of Sweat House Media

Class H2, H8 (Locobase 9895)

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

These were the passenger engines modified at the Moberly shops from several mixed-traffic H6 locomotives (Locobase 9899). 347, 1383, and 391 were placed in the H8 class, the others in H2. They were assigned to the WStL&P's Canadian division.

Locobase 11196 describes the 1887 Schenectady engine delivered to the Michigan Central that was claimed in 1899 to be the first passenger Ten-wheeler produced. These Wabash engines arguably deserve that distinction.

Class H6 (Locobase 9899)

Data from WAB 1907 Locomotive Diagrams book supplied in May 2005 by Allen Stanley from his extensive Raildata collection. Works numbers were 823-833, 916-923 in 1880; 924-925, 1010-1015 in 1881; and 1114-1121 in 1882.

In 1880, the Wabash went to this Ocean State builder for a big order of mixed-traffic engines. 477 and later were delivered with 56" drivers, but soon upgraded to 64" like the earlier locomotives.

All of the engines' road numbers received a 1 in 1885 and most regained their original numbers two years later. Indeed, within the H-6 class were some locomotives with 18" (348-350, 352, 388, 477, 480, 482, 560) and others with 19" cylinder diameters.

Specifications by Steve Llanso of Sweat House Media
ClassH2, H8H6
Locobase ID9895 9899
RailroadWabash, St Louis & PacificWabash, St Louis & Pacific
Number in Class741
Road Numbers347, 1351, 1353-54, 1383, 390-91, 1481-14, 1563345-355, 382-391, 477-482, 556-563
Number Built41
BuilderRhode IslandRhode Island
Valve GearStephensonStephenson
Locomotive Length and Weight
Driver Wheelbase15'15'
Engine Wheelbase25.35'25.35'
Ratio of driving wheelbase to overall engine wheebase 0.59 0.59
Overall Wheelbase (engine & tender)47.40'47.40'
Axle Loading (Maximum Weight per Axle)25400 lbs
Weight on Drivers70000 lbs70000 lbs
Engine Weight98000 lbs98000 lbs
Tender Light Weight75500 lbs75500 lbs
Total Engine and Tender Weight173500 lbs173500 lbs
Tender Water Capacity4500 gals5000 gals
Tender Fuel Capacity (oil/coal)
Minimum weight of rail (calculated)39 lb/yard39 lb/yard
Geometry Relating to Tractive Effort
Driver Diameter69"63"
Boiler Pressure160 psi160 psi
Cylinders (dia x stroke)18.5" x 24"19" x 24"
Tractive Effort16190 lbs18703 lbs
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.32 3.74
Heating Ability
Firebox Area118 sq. ft118 sq. ft
Grate Area17.50 sq. ft17.50 sq. ft
Evaporative Heating Surface1354 sq. ft1354 sq. ft
Superheating Surface
Combined Heating Surface1354 sq. ft1354 sq. ft
Evaporative Heating Surface/Cylinder Volume181.34171.92
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation28002800
Same as above plus superheater percentage28002800
Same as above but substitute firebox area for grate area1888018880
Power L147914147
Power MT452.67391.82

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