Blythesville, Leachville & Arkansas Southern 2-8-0 "Consolidation" Locomotives in the USA

Class Details by Steve Llanso of Sweat House Media

Class 7 (Locobase 16069)

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

A pair of Consolidations was delivered to the WNY&P Railroad in 1889 (see Locobase 8458) and after a long career and three renumberings, works number 9740 settled down on the BL&AS (which had a close relationship with the Cotton Belt).

This entry reflects the changes made when the 7 earned a new boiler in December 1921. The firebox dimensions changed very little, but the boiler now had more tubes of a smaller diameter. The result was less heating surface area. A higher boiler pressure generated more tractive effort while the adhesion and engine weights increased considerably and tender weight nearly doubled.

Returned to the SSW in December 1929 with its number, the 7 remained on their roster for two years before being sol to the Consolidated Gravel Company of Jonesboro, Ark.

Principal Dimensions by Steve Llanso of Sweat House Media

Locobase ID16069
RailroadBlythesville, Leachville & Arkansas Southern (SSW)
Number in Class1
Road Numbers7
Number Built
Valve GearStephenson
Locomotive Length and Weight
Driver Wheelbase (ft / m)14 / 4.27
Engine Wheelbase (ft / m)21 / 6.40
Ratio of driving wheelbase to overall engine wheelbase 0.67
Overall Wheelbase (engine & tender) (ft / m)49.25 / 15.01
Axle Loading (Maximum Weight per Axle) (lbs / kg)33,000 / 14,969
Weight on Drivers (lbs / kg)119,300 / 54,114
Engine Weight (lbs / kg)132,000 / 59,874
Tender Loaded Weight (lbs / kg)113,700 / 51,574
Total Engine and Tender Weight (lbs / kg)245,700 / 111,448
Tender Water Capacity (gals / ML)5000 / 18.94
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT)15 / 14
Minimum weight of rail (calculated) (lb/yd / kg/m)50 / 25
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)49 / 1245
Boiler Pressure (psi / kPa)160 / 11
High Pressure Cylinders (dia x stroke) (in / mm)20" x 24" / 508x610
Tractive Effort (lbs / kg)26,645 / 12085.98
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.48
Heating Ability
Tubes (number - dia) (in / mm)264 - 2" / 51
Flues (number - dia) (in / mm)
Flue/Tube length (ft / m)12.62 / 3.85
Firebox Area (sq ft / m2)158 / 14.68
Grate Area (sq ft / m2)23.80 / 2.21
Evaporative Heating Surface (sq ft / m2)1898 / 176.39
Superheating Surface (sq ft / m2)
Combined Heating Surface (sq ft / m2)1898 / 176.39
Evaporative Heating Surface/Cylinder Volume217.41
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation3808
Same as above plus superheater percentage3808
Same as above but substitute firebox area for grate area25,280
Power L14023
Power MT297.37

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