S.A. des Mines du Zaccar Beyer-Garratt Locomotives in Algeria


Class Details by Steve Llanso of Sweat House Media

Class AdTlie (Locobase 501)

Data from Gavin Hamilton's excellent compilation of Garratt data posted at [link] (6 September 2005). See also "Miliana-Margueritte Tramway" in the Wikipedia Encyclopedia at [link], last accessed 1 February 2021. Works numbers 1752 and 1783.

Two small mining Garratts that repeated the original St Leonard engine of 24 years earlier (Locobase 513). The second locomotive bore the name Pierre-Noire.

A brief history of this 9 km (5.6 mile) tramway appears in Locobase 513.

These were the last steam locomotives bought for the tramway. Later motive power was either delivered with diesel engines or, in the case of three 0-4-0T engines, retrofitted with diesels.

NB: Tube length is an estimate based on the calculation of tube surface area by subtracting reported firebox heating surface from reported total evaporative heating surface


Class Marguerite (Locobase 513)

Data is from Wiener (1930) and from Gavin Hamilton's compilation of Garratt data posted at [link] (6 September 2005). See also "Miliana-Margueritte Tramway" in the Wikipedia Encyclopedia at [link], last accessed 1 February 2021. Works number was 1781.

One of the first Beyer-Garratts, this one industrial engine built under license, but fitted with the usual Belpaire boiler. In service on an iron-ore railway.

The tramway over which the Marguerite operated linked the PLM's Algerian main line at its Miliana-Margueritte station with Mont Zaccar, site of a large iron-ore lode. Although originally projected in 1874, the first loads of iron-ore only came down the 9 km (5.6 mile) tramway on 7 October 1904.

Each of the first three 0-4-0 tank locomotives could haul six wagons, each carrying 5-10 tons of ore. A Garratt seemed ideal given its ability to carry a large boiler down a narrow, twisting right of way, so Zaccar bought this locomotive in 1912.

Two more Garratts arrived 24 years later; see Locobase

NB: Tube length is an estimate based on the calculation of tube surface area by subtracting reported firebox heating surface from reported total evaporative heating surface

Principal Dimensions by Steve Llanso of Middle Run Media
ClassAdTlieMarguerite
Locobase ID501 513
RailroadS.A. des Mines du ZaccarS.A. des Mines du Zaccar
CountryAlgeriaAlgeria
Whyte0-4-0+0-4-00-4-0+0-4-0
Number in Class21
Road Numbers8-95
Gauge75 cm785 mm
Number Built21
BuilderFUF Haine Saint-PierreSA Saint Leonard
Year19361912
Valve GearWalschaert
Locomotive Length and Weight
Driver Wheelbase (ft / m)
Engine Wheelbase (ft / m)25.79 / 7.86
Ratio of driving wheelbase to overall engine wheelbase
Overall Wheelbase (engine & tender) (ft / m)
Axle Loading (Maximum Weight per Axle) (lbs / kg)15,679 / 711215,653 / 7100
Weight on Drivers (lbs / kg)61,599 / 27,94161,729 / 28,000
Engine Weight (lbs / kg)61,599 / 27,94161,729 / 28,000
Tender Loaded Weight (lbs / kg)
Total Engine and Tender Weight (lbs / kg)
Tender Water Capacity (gals / ML)892 / 3.38871 / 3.30
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) 1.10 / 1 1.10 / 1
Minimum weight of rail (calculated) (lb/yd / kg/m)26 / 1326 / 13
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)26.40 / 67026.40 / 670
Boiler Pressure (psi / kPa)176.90 / 1220176.90 / 1220
High Pressure Cylinders (dia x stroke) (in / mm)9.06" x 13.78" / 230x350 (4)9" x 13.78" / 229x350 (4)
Tractive Effort (lbs / kg)12,885 / 5844.5412,715 / 5767.43
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.78 4.85
Heating Ability
Tubes (number - dia) (in / mm)190 - 1.614" / 41190 - 1.614" / 41
Flues (number - dia) (in / mm)
Flue/Tube length (ft / m) 7.22 / 2.20 7.22 / 2.20
Firebox Area (sq ft / m2)60.28 / 5.6060.28 / 5.60
Grate Area (sq ft / m2)15.28 / 1.4215.07 / 1.40
Evaporative Heating Surface (sq ft / m2)640 / 59.48640 / 59.46
Superheating Surface (sq ft / m2)
Combined Heating Surface (sq ft / m2)640 / 59.48640 / 59.46
Evaporative Heating Surface/Cylinder Volume311.22315.38
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation27032666
Same as above plus superheater percentage27032666
Same as above but substitute firebox area for grate area10,66410,664
Power L135633611
Power MT510.08515.86

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