Araraquara 4-6-0 Locomotives in Brazil


Class Details by Steve Llanso of Sweat House Media

Class 103 (Locobase 20546)

Data from Lionel Wiener, Les chemins de fer du Bre'sil

(Paris: H Dunod, 1912) , p. 13. Works number were 6209, 6256-6257 in 1911, 6432-6433 in 1912

Locobase could find little about this class. Based on a sample of its 47 entries describing Brazilian Ten-wheelers running on the metre gauge and built in or before 1912, the 103s fell in the middle of the pack.


Class Bueno de Andrade (Locobase 13144)

Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University, Volume 33, p. 28. Works numbers were 19868 in December 1901 and 34151 in January 1910.

This woodburning Ten-wheeler design was Baldwin's contribution to passenger power on this southeastern Brazilian road. Araraquara is a city located on the River D'ouro about 322 km (200 miles) northwest of Sao Paolo in the state's coffee-growing region. At the time of these little wood-burning Ten-wheelers' duty, the city held about 12,000 inhabitants; 100 years later the town was home to 200,000.

The railway began at Araraquara and extended further northwest to Sao Jose de Rio Preto. It would reach 255 km(158 mi) by 1919, at which time another 74 km (46 miles) was under construction.

The 4 and 14, although purchased nearly a decade apart, fulfilled exactly the same specs. These included the requirement to haul 185 trailing tons up a 2% grade on 40 lb/yard (20-kg/metre) rail.

Principal Dimensions by Steve Llanso of Middle Run Media
Class103Bueno de Andrade
Locobase ID20546 13144
RailroadAraraquaraAraraquara
CountryBrazilBrazil
Whyte4-6-04-6-0
Number in Class52
Road Numbers103-1074, 14
GaugeMetreMetre
Number Built52
BuilderHanomagBurnham, Williams & Co
Year19111901
Valve GearStephensonStephenson
Locomotive Length and Weight
Driver Wheelbase (ft / m)10.17 / 3.1012.58 / 3.83
Engine Wheelbase (ft / m)19.19 / 5.8523.83 / 7.26
Ratio of driving wheelbase to overall engine wheelbase 0.53 0.53
Overall Wheelbase (engine & tender) (ft / m)40.75 / 12.42
Axle Loading (Maximum Weight per Axle) (lbs / kg)
Weight on Drivers (lbs / kg)58,422 / 26,50052,000 / 23,587
Engine Weight (lbs / kg)77,162 / 35,00068,500 / 31,071
Tender Loaded Weight (lbs / kg)50,000 / 22,680
Total Engine and Tender Weight (lbs / kg)118,500 / 53,751
Tender Water Capacity (gals / ML)2500 / 9.472500 / 9.47
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT)
Minimum weight of rail (calculated) (lb/yd / kg/m)32 / 1629 / 14.50
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)43.30 / 110044 / 1118
Boiler Pressure (psi / kPa)200.20 / 1380170 / 1100
High Pressure Cylinders (dia x stroke) (in / mm)13.78" x 21.65" / 350x55015" x 18" / 381x432
Tractive Effort (lbs / kg)16,157 / 7328.7013,301 / 6033.24
Factor of Adhesion (Weight on Drivers/Tractive Effort) 3.62 3.91
Heating Ability
Tubes (number - dia) (in / mm)152 - 1.89" / 48162 - 2" / 51
Flues (number - dia) (in / mm)
Flue/Tube length (ft / m)11.65 / 3.5510.92 / 3.33
Firebox Area (sq ft / m2)95.80 / 8.9075 / 6.97
Grate Area (sq ft / m2)14.53 / 1.3512 / 1.12
Evaporative Heating Surface (sq ft / m2)969 / 90995 / 92.47
Superheating Surface (sq ft / m2)
Combined Heating Surface (sq ft / m2)969 / 90995 / 92.47
Evaporative Heating Surface/Cylinder Volume259.29270.27
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation29092040
Same as above plus superheater percentage29092040
Same as above but substitute firebox area for grate area19,17912,750
Power L155984639
Power MT633.74590.03

All material Copyright © SteamLocomotive.com
Wes Barris