Compagnie du Luxembourg / Belgian State 2-4-0 Locomotives in Belgium

Class Details by Steve Llanso of Sweat House Media

Class 72 (Locobase 10371)

Data from "Old Belgian Locomotives," The Locomotive Magazine, Vol IX (19 September 1903)., p.172. St Leonard works numbers were 273-280.

Built for the Brussels-Namur traffic on the C du Lu's main line, this octet was bigger than what would be classed as Type 1 (see Locobase 10360), but had much smaller drivers. As delivered, the class had its steam squarely over the front coupled axle. The locomotives had frames of brick red and black lines, both the boiler and the splashers had bands of polished brass.

They coped with the stiff adverse grades for about 11 years, during which time the C du Lu was absorbed by the Belgian State system. Increasing train weights, however, overwhelmed their capacity and they were reassigned to working local traffic out of Antwerp.

Principal Dimensions by Steve Llanso of Middle Run Media

Locobase ID10371
RailroadCompagnie du Luxembourg / Belgian State
Number in Class8
Road Numbers72-79 / 870-877
Number Built8
BuilderSA Saint Leonard
Valve GearStephenson
Locomotive Length and Weight
Driver Wheelbase (ft / m)
Engine Wheelbase (ft / m)13.94 / 4.25
Ratio of driving wheelbase to overall engine wheelbase
Overall Wheelbase (engine & tender) (ft / m)
Axle Loading (Maximum Weight per Axle) (lbs / kg)27,999 / 12,700
Weight on Drivers (lbs / kg)47,840 / 21,700
Engine Weight (lbs / kg)72,752 / 33,000
Tender Loaded Weight (lbs / kg)
Total Engine and Tender Weight (lbs / kg)
Tender Water Capacity (gals / ML)2112 / 8
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) 4.40 / 4
Minimum weight of rail (calculated) (lb/yd / kg/m)40 / 20
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)68.50 / 1740
Boiler Pressure (psi / kPa)114.60 / 7.90
High Pressure Cylinders (dia x stroke) (in / mm)16.54" x 24.02" / 420x610
Tractive Effort (lbs / kg)9345 / 4238.83
Factor of Adhesion (Weight on Drivers/Tractive Effort) 5.12
Heating Ability
Tubes (number - dia) (in / mm)199 - 2.008" / 51
Flues (number - dia) (in / mm)
Flue/Tube length (ft / m)11.48 / 3.50
Firebox Area (sq ft / m2)93.07 / 8.65
Grate Area (sq ft / m2)22.60 / 2.10
Evaporative Heating Surface (sq ft / m2)1023 / 95.10
Superheating Surface (sq ft / m2)
Combined Heating Surface (sq ft / m2)1023 / 95.10
Evaporative Heating Surface/Cylinder Volume171.26
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation2590
Same as above plus superheater percentage2590
Same as above but substitute firebox area for grate area10,666
Power L13260
Power MT300.46

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