Blythesville, Leachville & Arkansas Southern 2-8-0 "Consolidation" Locomotives of 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 Raildata collection.

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.

Specifications by Steve Llanso of Sweat House Media
Locobase ID16,069
RailroadBlythesville, Leachville & Arkansas Southern (SSW)
Number in Class1
Road Numbers7
Number Built
Valve GearStephenson
Locomotive Length and Weight
Driver Wheelbase (ft)14
Engine Wheelbase (ft)21
Ratio of driving wheelbase to overall engine wheebase 0.67
Overall Wheelbase (engine & tender) (ft)49.25
Axle Loading (Maximum Weight per Axle) (lbs)33,000
Weight on Drivers (lbs)119,300
Engine Weight (lbs)132,000
Tender Loaded Weight (lbs)113,700
Total Engine and Tender Weight (lbs)245,700
Tender Water Capacity (gals)5000
Tender Fuel Capacity (oil/coal) (gals/tons)15
Minimum weight of rail (calculated) (lb/yd)50
Geometry Relating to Tractive Effort
Driver Diameter (in)49
Boiler Pressure (psi)160
High Pressure Cylinders (dia x stroke) (in)20" x 24"
Tractive Effort (lbs)26,645
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.48
Heating Ability
Firebox Area (sq ft)158
Grate Area (sq ft)23.80
Evaporative Heating Surface (sq ft)1898
Superheating Surface (sq ft)
Combined Heating Surface (sq ft)1898
Evaporative Heating Surface/Cylinder Volume217.49
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 L14025
Power MT297.52

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