Southern Railway & Navigation 2-6-2 "Prairie" Locomotives of the USA

Class Details by Steve Llanso of Sweat House Media

Class 30 (Locobase 14061)

Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist Universitym Volume 45, p. 136. Works number was 40948 in November 1913.

The Southern did not operate the 30 for long before selling it to the F B Williams Cypress Company in January 1916. The engine was to placed in "good condition" using parts supplied by Baldwin's Extra Work Department.

Williams Cypress later sold the 30 to the Orange Grove Plantation and Orange Grove sold it to Sterling Sugar, which operated the little Mogul for years (possibly until 1948).

Specifications by Steve Llanso of Sweat House Media
Locobase ID14061
RailroadSouthern Railway & Navigation
Number in Class1
Road Numbers30
Number Built1
Valve GearStephenson
Locomotive Length and Weight
Driver Wheelbase8'
Engine Wheelbase21.33'
Ratio of driving wheelbase to overall engine wheebase 0.38
Overall Wheelbase (engine & tender)43'
Axle Loading (Maximum Weight per Axle)
Weight on Drivers45000 lbs
Engine Weight62000 lbs
Tender Light Weight50000 lbs
Total Engine and Tender Weight112000 lbs
Tender Water Capacity2500 gals
Tender Fuel Capacity (oil/coal)5 tons
Minimum weight of rail (calculated)25 lb/yard
Geometry Relating to Tractive Effort
Driver Diameter37"
Boiler Pressure180 psi
Cylinders (dia x stroke)12" x 18"
Tractive Effort10718 lbs
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.20
Heating Ability
Firebox Area60 sq. ft
Grate Area13.30 sq. ft
Evaporative Heating Surface551 sq. ft
Superheating Surface
Combined Heating Surface551 sq. ft
Evaporative Heating Surface/Cylinder Volume233.85
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation2394
Same as above plus superheater percentage2394
Same as above but substitute firebox area for grate area10800
Power L14009
Power MT589.22

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