Wabash, St Louis & Pacific 4-6-0 "Ten-Wheeler" Locomotives in 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 Rail Data Exchange.

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 Rail Data Exchange. 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.

Principal Dimensions by Steve Llanso of Sweat House Media
ClassH2, H8H6
Locobase ID9895 9899
RailroadWabash, St Louis & PacificWabash, St Louis & Pacific
CountryUSAUSA
Whyte4-6-04-6-0
Number in Class741
Road Numbers347, 1351, 1353-54, 1383, 390-91, 1481-14, 1563345-355, 382-391, 477-482, 556-563
GaugeStdStd
Number Built41
BuilderRhode IslandRhode Island
Year18871880
Valve GearStephensonStephenson
Locomotive Length and Weight
Driver Wheelbase (ft / m)15 / 4.5715 / 4.57
Engine Wheelbase (ft / m)25.35 / 7.7325.35 / 7.73
Ratio of driving wheelbase to overall engine wheebase 0.59 0.59
Overall Wheelbase (engine & tender) (ft / m)47.40 / 14.4547.40 / 14.45
Axle Loading (Maximum Weight per Axle) (lbs / kg)25,400 / 11,521
Weight on Drivers (lbs / kg)70,000 / 31,75270,000 / 31,752
Engine Weight (lbs / kg)98,000 / 44,45298,000 / 44,452
Tender Loaded Weight (lbs / kg)75,500 / 34,24675,500 / 34,246
Total Engine and Tender Weight (lbs / kg)173,500 / 78,698173,500 / 78,698
Tender Water Capacity (gals / ML)4500 / 17.055000 / 18.94
Tender Fuel Capacity (oil/coal) (gals/tons / ML/MT)
Minimum weight of rail (calculated) (lb/yd / kg/m)39 / 19.5039 / 19.50
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)69 / 175363 / 1600
Boiler Pressure (psi / kPa)160 / 11160 / 11
High Pressure Cylinders (dia x stroke) (in / mm)18.5" x 24" / 470x61019" x 24" / 483x610
Tractive Effort (lbs / kg)16,190 / 7343.6718,703 / 8483.55
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.32 3.74
Heating Ability
Firebox Area (sq ft / m2)118 / 10.96118 / 10.97
Grate Area (sq ft / m2)17.50 / 1.6317.50 / 1.63
Evaporative Heating Surface (sq ft / m2)1354 / 125.791354 / 125.84
Superheating Surface (sq ft / m2)
Combined Heating Surface (sq ft / m2)1354 / 125.791354 / 125.84
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 area18,88018,880
Power L147914147
Power MT452.67391.82

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