Brazil Northeastern 4-6-0 Locomotives in Brazil


Class Details by Steve Llanso of Sweat House Media

Class 12 (Locobase 13976)

Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University Volume 44, p.147. (Thanks to Teemu Koivumaki for his 30 March 2021 email correcting the works numbers.) Works numbers were 38655-38657 in November 1912.

The South American Railway Construction Company added to its class of Ten-wheelers by ordering near-duplicates of the 1911 engines shown in Locobase 13870. The new trio put two more short tons on the drivers, used boilers pressed to 170 psi, and trailed bigger tenders. Axle loading on the drivers would vary from 7 1/2 (16,535 lb) to 8 1/2 metric tons (18,739 lb).

The grate area was a bit smaller, possibly of narrowing the grate slightly to increase the distance between the hot outside wall of the firebox and the 3rd driver on each side. Coal grates were shipped as an extra set when these locomotives were delivered.

Gene Connelly's Baldwin production list


Class 7 (Locobase 13870)

Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University Volume 39, p.243. Works numbers were 36699-36700 in July 1911.

The South American Railway Construction Company bought four locomotives for the EFNB to built in succession on Baldwin's production line. These came first; the two Consolidations that followed appear in Locobase 13869.

Comparing the two designs shows that even engines built at the same time for the same railroad differed markedly depending on their intended services. Woodburners using the same-size grate as the 2-8-0s, the 7 and 8 had deeper fireboxes, fewer tubes of larger diameter, larger boiler with more area, and greater total engine weight.

Two "hereafter" notes appear in the specs, each a tweak. One from the Erecting Shop dated 28 July 1911 requested that Baldwin "move throttle lever back to a more convenient position for [engineer]." The other, dated 7 August 1911, asked that Baldwin "raise forward section of running board to clear reverse shaft arm".

Principal Dimensions by Steve Llanso of Middle Run Media

Class127
Locobase ID13976 13870
RailroadBrazil NortheasternBrazil Northeastern
CountryBrazilBrazil
Whyte4-6-04-6-0
Number in Class32
Road Numbers12-147-8
GaugeMetreMetre
Number Built32
BuilderBaldwinBaldwin
Year19121911
Valve GearWalschaertWalschaert
Locomotive Length and Weight
Driver Wheelbase (ft / m)10.75 / 3.2810.75 / 3.28
Engine Wheelbase (ft / m)19.83 / 6.0419.83 / 6.04
Ratio of driving wheelbase to overall engine wheelbase 0.54 0.54
Overall Wheelbase (engine & tender) (ft / m)43.71 / 13.3245 / 13.72
Axle Loading (Maximum Weight per Axle) (lbs / kg)18,739 / 8500
Weight on Drivers (lbs / kg)59,000 / 26,76255,000 / 24,948
Engine Weight (lbs / kg)75,800 / 34,38272,000 / 32,659
Tender Loaded Weight (lbs / kg)52,000 / 23,58736,000 / 16,329
Total Engine and Tender Weight (lbs / kg)127,800 / 57,969108,000 / 48,988
Tender Water Capacity (gals / ML)2400 / 9.091800 / 6.82
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT)
Minimum weight of rail (calculated) (lb/yd / kg/m)33 / 16.5031 / 15.50
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)42 / 106742 / 1067
Boiler Pressure (psi / kPa)170 / 11.70160 / 11
High Pressure Cylinders (dia x stroke) (in / mm)15" x 18" / 381x45715" x 18" / 381x457
Tractive Effort (lbs / kg)13,934 / 6320.3613,114 / 5948.42
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.23 4.19
Heating Ability
Tubes (number - dia) (in / mm)147 - 2" / 51147 - 2" / 51
Flues (number - dia) (in / mm)
Flue/Tube length (ft / m)12.25 / 3.7312.25 / 3.73
Firebox Area (sq ft / m2)86 / 7.9986 / 7.99
Grate Area (sq ft / m2)14.60 / 1.3615.10 / 1.40
Evaporative Heating Surface (sq ft / m2)1023 / 95.041023 / 95.04
Superheating Surface (sq ft / m2)
Combined Heating Surface (sq ft / m2)1023 / 95.041023 / 95.04
Evaporative Heating Surface/Cylinder Volume277.87277.87
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation24822416
Same as above plus superheater percentage24822416
Same as above but substitute firebox area for grate area14,62013,760
Power L146974420
Power MT526.53531.51

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