Deering & SouthWestern / St Louis, Arkansas & Texas 4-6-0 "Ten-Wheeler" Locomotives in the USA


Class Details by Steve Llanso of Sweat House Media

Class A1 (Locobase 8459)

Data from StL&SW 1 - 1932 Folio 725 Locomotive Diagrams supplied in May 2005 by Allen Stanley from his extensive Rail Data Exchange. Joseph A Strapac, Cotton Belt Locomotives (Huntington, Calif: Shade Tree Books, 1977, reprinted in 1999 by Indiana University Press), p. 88. See also DeGolyer, Vol 65, pp. 88+. Works number was 54088 in November 1920.

he 8 had a short career. Delivered to the Missouri shortline in 1920, it was taken over by the Cotton Belt (St Louis-Southwestern) in 1929, redesignated A-1, and scrapped in July 1933. Although it was indeed small for a Ten-wheeler, Locobase is still surprised that a buyer for such a new engine couldn't be found.


Class B3 (Locobase 3485)

Data from StL&SW 1 - 1932 Folio 725 Locomotive Diagrams supplied in May 2005 by Allen Stanley from his extensive Rail Data Exchange.

NY Loco builder information from JF Webber's compilation as supplied by Allen Stanley in March 2004. This large class were works #166-195 (October-November 1886). Webber describes the class as having 16 x 24" cylinders

This railroad was reorganized as the St Louis-Southwestern (Cotton Belt) in 1891. (See [] for a detailed history of the Cotton Belt.)

Firebox heating surface includes 16 sq ft of arch tubes. In the twenties, Cotton Belt mechanics replaced slide with piston valves and fitted Walschaerts radial valve gear as well as superheating the locomotives and converting them to oil burners.

Principal Dimensions by Steve Llanso of Sweat House Media
ClassA1B3
Locobase ID8459 3485
RailroadDeering & SouthWestern (StLSW)St Louis, Arkansas & Texas (StLSW)
CountryUSAUSA
Whyte4-6-04-6-0
Number in Class130
Road Numbers8115-144
GaugeStdStd
Number Built130
BuilderBaldwinNew York
Year19201886
Valve GearStephensonStephenson
Locomotive Length and Weight
Driver Wheelbase (ft / m)11 / 3.3514 / 4.27
Engine Wheelbase (ft / m)21 / 6.4023.92 / 7.29
Ratio of driving wheelbase to overall engine wheebase 0.52 0.59
Overall Wheelbase (engine & tender) (ft / m)48.67 / 14.8347.29 / 14.41
Axle Loading (Maximum Weight per Axle) (lbs / kg)23,800 / 10,796
Weight on Drivers (lbs / kg)71,000 / 32,20578,000 / 35,380
Engine Weight (lbs / kg)101,000 / 45,813113,000 / 51,256
Tender Loaded Weight (lbs / kg)95,500 / 43,31879,700 / 36,151
Total Engine and Tender Weight (lbs / kg)196,500 / 89,131192,700 / 87,407
Tender Water Capacity (gals / ML)4800 / 18.183800 / 14.39
Tender Fuel Capacity (oil/coal) (gals/tons / ML/MT)8 / 7.3010 / 9.10
Minimum weight of rail (calculated) (lb/yd / kg/m)39 / 19.5043 / 21.50
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)51 / 129557 / 1448
Boiler Pressure (psi / kPa)170 / 11.70120 / 8.30
High Pressure Cylinders (dia x stroke) (in / mm)16" x 24" / 406x61017" x 24" / 432x610
Tractive Effort (lbs / kg)17,408 / 7896.1512,412 / 5630.00
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.08 6.28
Heating Ability
Firebox Area (sq ft / m2)90.70 / 8.43121 / 11.25
Grate Area (sq ft / m2)18.10 / 1.6816.70 / 1.55
Evaporative Heating Surface (sq ft / m2)1203 / 111.801225 / 113.85
Superheating Surface (sq ft / m2)
Combined Heating Surface (sq ft / m2)1203 / 111.801225 / 113.85
Evaporative Heating Surface/Cylinder Volume215.40194.29
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation30772004
Same as above plus superheater percentage30772004
Same as above but substitute firebox area for grate area15,41914,520
Power L142863309
Power MT399.25280.58

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