J LePrevost 2-8-2 Locomotives in Brazil


Class Details by Steve Llanso of Sweat House Media

Class 237 (Locobase 15398)

Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University,Vol 78, pp. 262+. Works numbers were 58341-58342 in April 1925.

See Locobase 15397 for a description of this design. These and two others shown in Locobse 15396 were built as part of a large order of locomotives for the Sao Paulo Rio Grande.

Whatever the original reason for sending these two engines to LePrevost, they were delivered with consecutive numbers as part of the overall SPRG roster and would soon join that railway.

Principal Dimensions by Steve Llanso of Sweat House Media

Class237
Locobase ID15398
RailroadJ LePrevost
CountryBrazil
Whyte2-8-2
Number in Class2
Road Numbers327-328
GaugeMetre
Number Built2
BuilderBaldwin
Year1925
Valve GearWalschaert
Locomotive Length and Weight
Driver Wheelbase (ft / m)11 / 3.35
Engine Wheelbase (ft / m)26.42 / 8.05
Ratio of driving wheelbase to overall engine wheelbase 0.42
Overall Wheelbase (engine & tender) (ft / m)50.50 / 15.39
Axle Loading (Maximum Weight per Axle) (lbs / kg)21,000 / 9525
Weight on Drivers (lbs / kg)79,500 / 36,061
Engine Weight (lbs / kg)110,500 / 50,122
Tender Loaded Weight (lbs / kg)58,500 / 26,535
Total Engine and Tender Weight (lbs / kg)169,000 / 76,657
Tender Water Capacity (gals / ML)2600 / 9.85
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) 5.50 / 5
Minimum weight of rail (calculated) (lb/yd / kg/m)33 / 16.50
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)40 / 1016
Boiler Pressure (psi / kPa)180 / 12.40
High Pressure Cylinders (dia x stroke) (in / mm)16" x 20" / 406x508
Tractive Effort (lbs / kg)19,584 / 8883.16
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.06
Heating Ability
Tubes (number - dia) (in / mm)100 - 2" / 51
Flues (number - dia) (in / mm)16 - 5.375" / 137
Flue/Tube length (ft / m)13 / 3.96
Firebox Area (sq ft / m2)152 / 14.12
Grate Area (sq ft / m2)38.20 / 3.55
Evaporative Heating Surface (sq ft / m2)1120 / 104.05
Superheating Surface (sq ft / m2)277 / 25.73
Combined Heating Surface (sq ft / m2)1397 / 129.78
Evaporative Heating Surface/Cylinder Volume240.64
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation6876
Same as above plus superheater percentage8251
Same as above but substitute firebox area for grate area32,832
Power L111,275
Power MT1250.67

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