Belgian State Articulated Locomotives in Belgium


Class Details by Steve Llanso of Sweat House Media

Class unknown (Locobase 15529)

Data from "Une locomotive compound de 99 tonnes," Le Genie Civil , Tome XXXII, Nr 23 (9 Avril 1898), (reporting an item from Fortschritte des Eisenbahnwesens of January 1898), p. 386. See also Maurice Demoulin, TraitT pratique de la machine locomotive (Baudry, 1898), pp.404-405.

The report stated that at the time of its introduction, the Mallet was the largest of its type in service and was equipped with the largest grate. The boiler was fitted with internally finned, large-diameter Serve tubes. All four cylinders took steam from piston valves.


Class unknown (Locobase 20977)

Data from "Heavy Banking Locomotives, Belgian State Railways", The Engineer, Volume 41, No. 5 (2 February 1906), pp. 109, 113.

The builder who put delivered the first six-axle mallet tank to the Belgian State Railways in 1897 (Locobase 15529) enlarged the design to increase the pushing power on the 1 in 33 (3%) grades between Liege and Ans on the Brussels-Antwerp line from Aix.

The engine used long-stroke piston valves to supply steam to both the HP and LP cylinders. Its enormous Belpaire firebox measured 3.70 m (12 ft 13/8") long, a Wootten-like 2.90 m (9 ft 4 1/2") wide, and a maximum height of 1.22 m (4 ft). This expanse of grate burned dust-like "slack" coal. Engineer's report claimed that the growing use of briquettes (compressed bricks of low-calorie fuel) would eliminate the need for such a big grate.

Principal Dimensions by Steve Llanso of Sweat House Media

Classunknownunknown
Locobase ID15529 20977
RailroadBelgian StateBelgian State
CountryBelgiumBelgium
Whyte0-6-6-0T0-6-6-0T
Number in Class1
Road Numbers
GaugeStdStd
Number Built1
BuilderSA Saint LeonardSA Saint Leonard
Year18971905
Valve GearWalschaertWalschaert
Locomotive Length and Weight
Driver Wheelbase (ft / m)30.68 / 9.3519.69 / 6
Engine Wheelbase (ft / m)30.68 / 9.3519.69 / 6
Ratio of driving wheelbase to overall engine wheelbase11
Overall Wheelbase (engine & tender) (ft / m)30.68 / 9.3530.76 / 9.38
Axle Loading (Maximum Weight per Axle) (lbs / kg)
Weight on Drivers (lbs / kg)218,257 / 99,000245,484 / 111,350
Engine Weight (lbs / kg)218,257 / 99,00025,022 / 11,350
Tender Loaded Weight (lbs / kg)
Total Engine and Tender Weight (lbs / kg)218,257 / 99,00025,022 / 11,350
Tender Water Capacity (gals / ML)2376 / 92376 / 9
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) 3.30 / 3 3.30 / 3
Minimum weight of rail (calculated) (lb/yd / kg/m)61 / 30.5068 / 34
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)49.90 / 126853.50 / 1360
Boiler Pressure (psi / kPa)213.20 / 14.70213.20 / 14.70
High Pressure Cylinders (dia x stroke) (in / mm)21.65" x 25.59" / 550x65019.69" x 25.59" / 500x650
Low Pressure Cylinders (dia x stroke) (in / mm)31.85" x 25.59" / 809x65031.5" x 25.59" / 800x650
Tractive Effort (lbs / kg)59,588 / 27028.6948,328 / 21921.24
Factor of Adhesion (Weight on Drivers/Tractive Effort) 3.66 5.08
Heating Ability
Tubes (number - dia) (in / mm)164 - 2.756" / 70
Flues (number - dia) (in / mm)
Flue/Tube length (ft / m)13.12 / 4
Firebox Area (sq ft / m2)161.46 / 15
Grate Area (sq ft / m2)75.35 / 784.50 / 7.85
Evaporative Heating Surface (sq ft / m2)2799 / 2602959 / 274.90
Superheating Surface (sq ft / m2)
Combined Heating Surface (sq ft / m2)2799 / 2602959 / 274.90
Evaporative Heating Surface/Cylinder Volume256.71328.10
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation16,06518,015
Same as above plus superheater percentage16,06518,015
Same as above but substitute firebox area for grate area34,423
Power L13102
Power MT167.15

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