Vredenburgh Saw Mill Company 2-8-0 "Consolidation" Locomotives in the USA

Class Details by Steve Llanso of Sweat House Media

Class 12 (Locobase 14972)

Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University Volume 65, pp. 317+. Works number was 54431 in January 1921.

Seven years after this Alabama sawmill purchased a Ten-wheeler from Baldwin (Locobase 14055), it bought this somewhat larger logging Consolidation from Eddystone. As its dimensions suggest, the 12's main role was straight freight service on the Georgia, Florida & Alabama Railroad. It still had to contend with 58 lb/yard (29 kg/metre) rail and curves as tight as 25 degrees (radii of 231 feet/70.4 metres).

Principal Dimensions by Steve Llanso of Sweat House Media
Locobase ID14,972
RailroadVredenburgh Saw Mill Company
Number in Class1
Road Numbers12
Number Built1
Valve GearWalschaert
Locomotive Length and Weight
Driver Wheelbase (ft / m)14 / 4.27
Engine Wheelbase (ft / m)21.67 / 6.61
Ratio of driving wheelbase to overall engine wheebase 0.65
Overall Wheelbase (engine & tender) (ft / m)51.58 / 15.72
Axle Loading (Maximum Weight per Axle) (lbs / kg)
Weight on Drivers (lbs / kg)121,000 / 54,885
Engine Weight (lbs / kg)134,400 / 60,963
Tender Loaded Weight (lbs / kg)107,700 / 48,852
Total Engine and Tender Weight (lbs / kg)242,100 / 109,815
Tender Water Capacity (gals / ML)5000 / 18.94
Tender Fuel Capacity (oil/coal) (gals/tons / ML/MT)9 / 8.20
Minimum weight of rail (calculated) (lb/yd / kg/m)50 / 25
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)50 / 1270
Boiler Pressure (psi / kPa)200 / 13.80
High Pressure Cylinders (dia x stroke) (in / mm)19" x 24" / 483x610
Tractive Effort (lbs / kg)29,458 / 13361.94
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.11
Heating Ability
Firebox Area (sq ft / m2)132 / 12.26
Grate Area (sq ft / m2)27.50 / 2.55
Evaporative Heating Surface (sq ft / m2)1622 / 150.69
Superheating Surface (sq ft / m2)
Combined Heating Surface (sq ft / m2)1622 / 150.69
Evaporative Heating Surface/Cylinder Volume205.95
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation5500
Same as above plus superheater percentage5500
Same as above but substitute firebox area for grate area26,400
Power L14829
Power MT351.94

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