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 ID16069
RailroadBlythesville, Leachville & Arkansas Southern (SSW)
Number in Class1
Road Numbers7
Number Built
Valve GearStephenson
Locomotive Length and Weight
Driver Wheelbase14'
Engine Wheelbase21'
Ratio of driving wheelbase to overall engine wheebase 0.67
Overall Wheelbase (engine & tender)49.25'
Axle Loading (Maximum Weight per Axle)33000 lbs
Weight on Drivers119300 lbs
Engine Weight132000 lbs
Tender Light Weight113700 lbs
Total Engine and Tender Weight245700 lbs
Tender Water Capacity5000 gals
Tender Fuel Capacity (oil/coal)15 tons
Minimum weight of rail (calculated)50 lb/yard
Geometry Relating to Tractive Effort
Driver Diameter49"
Boiler Pressure160 psi
Cylinders (dia x stroke)20" x 24"
Tractive Effort26645 lbs
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.48
Heating Ability
Firebox Area158 sq. ft
Grate Area23.80 sq. ft
Evaporative Heating Surface1898 sq. ft
Superheating Surface
Combined Heating Surface1898 sq. ft
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 area25280
Power L14025
Power MT297.52

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