Bone-Guelma 2-6-0 Locomotives in Tunisia


Class Details by Steve Llanso of Sweat House Media

Class 281 (Locobase 12378)

Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University Volume 22, p. 194 . Works numbers were 17264-17267 in December 1899.

Bone is a city in Tunisia, which was then part of the French colony of Algiers; the Bone-Guelma was based in Algiers. Including its extensions, the B-G encompassed 705 route miles (1,134 route km). Its main line ran from Suk (Souk) Ahras in Algeria up the Majerda river's valley to Tunis, branching to Bizerta as well.

The two orders from the B-G et Prolongemonts reflected two sets of requirements. The quartet in the current entry clearly were intended for light freight duty. The others are shown in Locobasd 12379.


Class 81 (Locobase 12379)

Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University Volume 22, p.195 . Works numbers were 17247-17250 in November 1899 and 17268-17269 in December.

As Baldwin was producing the low-drivered Mogul tanks for the metre gauge that shown in Locobase 12378, it was also turning out this sextet of larger engines with taller drivers for the 4 foot 9-inch (1450-mm) gauge.

Principal Dimensions by Steve Llanso of Sweat House Media
Class28181
Locobase ID12,378 12,379
RailroadBone-Guelma (et Prolongemonts)Bone-Guelma (et Prolongemonts)
CountryTunisiaTunisia
Whyte2-6-0T2-6-0T
Number in Class46
Road Numbers281-28481-86
GaugeMetreStd
Number Built46
BuilderBurnham, Williams & CoBurnham, Williams & Co
Year18991899
Valve GearStephensonStephenson
Locomotive Length and Weight
Driver Wheelbase (ft / m)11 / 3.3514.17 / 4.32
Engine Wheelbase (ft / m)18.50 / 5.6421.50 / 6.55
Ratio of driving wheelbase to overall engine wheebase 0.59 0.66
Overall Wheelbase (engine & tender) (ft / m)18.50 / 5.6421.50 / 6.55
Axle Loading (Maximum Weight per Axle) (lbs / kg)
Weight on Drivers (lbs / kg)73,800 / 33,47581,000 / 36,741
Tender Loaded Weight (lbs / kg)
Total Engine and Tender Weight (lbs / kg)83,70096,000
Tender Water Capacity (gals / ML)900 / 3.411450 / 5.49
Tender Fuel Capacity (oil/coal) (gals/tons / ML/MT)
Minimum weight of rail (calculated) (lb/yd / kg/m)41 / 20.5045 / 22.50
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)43 / 109259 / 1499
Boiler Pressure (psi / kPa)160 / 11160 / 11
High Pressure Cylinders (dia x stroke) (in / mm)16" x 20" / 406x50817" x 24" / 432x610
Tractive Effort (lbs / kg)16,193 / 7345.0315,988 / 7252.04
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.56 5.07
Heating Ability
Firebox Area (sq ft / m2)87.30 / 8.1196.70 / 8.99
Grate Area (sq ft / m2)13.40 / 1.2514 / 1.30
Evaporative Heating Surface (sq ft / m2)811 / 75.37885 / 82.25
Superheating Surface (sq ft / m2)
Combined Heating Surface (sq ft / m2)811 / 75.37885 / 82.25
Evaporative Heating Surface/Cylinder Volume174.25140.36
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation21442240
Same as above plus superheater percentage21442240
Same as above but substitute firebox area for grate area13,96815,472
Power L130733415
Power MT275.40278.84

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