Federaes Brazileiras Rede Sul Mineira 4-6-0 Locomotives in Brazil


Class Details by Steve Llanso of Sweat House Media

Class 172 (Locobase 15268)

Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University, Vol 72, p 113. Works numbers were 57373-57378 in October 1923.

Wood-burning Ten-wheelers that served the RSM in both passenger and freight service. The superheated steam was admitted through 8" (203 mm) piston valves. The design repeated most of the specifications of the slightly earlier Consolidations, but had shorter boilers and longer, but narrower fireboxes that lay between the frames.

See Locobase 6708 for P W Fitzpatrick's letter describing the RSM's operating conditions at the time and the need for special sanding arrangements.

Principal Dimensions by Steve Llanso of Sweat House Media

Class172
Locobase ID15268
RailroadFederaes Brazileiras Rede Sul Mineira (RSM)
CountryBrazil
Whyte4-6-0
Number in Class6
Road Numbers172-177
GaugeMetre
Number Built6
BuilderBaldwin
Year1923
Valve GearWalschaert
Locomotive Length and Weight
Driver Wheelbase (ft / m)11 / 3.35
Engine Wheelbase (ft / m)20.33 / 6.20
Ratio of driving wheelbase to overall engine wheelbase 0.54
Overall Wheelbase (engine & tender) (ft / m)45.21 / 13.78
Axle Loading (Maximum Weight per Axle) (lbs / kg)27,558 / 12,500
Weight on Drivers (lbs / kg)76,000 / 34,473
Engine Weight (lbs / kg)95,000 / 43,091
Tender Loaded Weight (lbs / kg)65,000 / 29,484
Total Engine and Tender Weight (lbs / kg)160,000 / 72,575
Tender Water Capacity (gals / ML)3500 / 13.26
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT)
Minimum weight of rail (calculated) (lb/yd / kg/m)42 / 21
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)45 / 1143
Boiler Pressure (psi / kPa)190 / 13.10
High Pressure Cylinders (dia x stroke) (in / mm)16" x 20" / 406x508
Tractive Effort (lbs / kg)18,375 / 8334.77
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.14
Heating Ability
Tubes (number - dia) (in / mm)110 - 2" / 51
Flues (number - dia) (in / mm)18 - 5.375" / 137
Flue/Tube length (ft / m)11.50 / 3.51
Firebox Area (sq ft / m2)111 / 10.31
Grate Area (sq ft / m2)16.30 / 1.51
Evaporative Heating Surface (sq ft / m2)1088 / 101.08
Superheating Surface (sq ft / m2)232 / 21.55
Combined Heating Surface (sq ft / m2)1320 / 122.63
Evaporative Heating Surface/Cylinder Volume233.77
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation3097
Same as above plus superheater percentage3654
Same as above but substitute firebox area for grate area24,886
Power L111,423
Power MT994.08

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