Belgian State 4-6-4 Locomotives in Belgium

Class Details by Steve Llanso of Sweat House Media

Class Type 13 (Locobase 10018)

Data from "Some Interesting Types of Belgian Locomotives" Locomotive News and Railway Notes, Volume XII [12], p. 93. See also "Passenger Tank Engine", The Railway World, Volume 57, No 10 (October 1913), p. 853, and "Baltic Type Tank Locomotive", The Locomotive, Volume 19 (14 June 1914), p. 118.

The LN&RC report said that the Baltic could be seen either as an enlargement of the 4-4-2T Atlantic tank or a tank engine derivative of the Type 9 4-6-0. The only signficant difference from the latter was a decrease in cylinder diameter from 445 mm to 420.

NB: Locomotive Magazine reported that the design had 268 small tubes of two-inch outside diameter. It's possible that the Locomotive used the wrong figure or that the Railway World, which offered the 189 tube count, believed that the tube heating surface area represented the tubes' external diameters and "corrected" the tube count. The LN&RC's entry may broken the deadlock as its tube count suggests a simple typographical error in the LM report.)

Using the latter's data revealed that tube heating surface calculation reflected the interior diameters of the tubes and flues. Together with the firebox area, the result came to 139.62 sq m (1,503 sq ft). Calculating the tube heating surface from the outside diameters given in the data fiche yields the figure shown above.

Principal Dimensions by Steve Llanso of Sweat House Media

ClassType 13
Locobase ID10018
RailroadBelgian State
Number in Class2
Road Numbers
Number Built2
Valve GearWalschaert
Locomotive Length and Weight
Driver Wheelbase (ft / m)12.96 / 3.95
Engine Wheelbase (ft / m)41.70 / 12.71
Ratio of driving wheelbase to overall engine wheelbase 0.31
Overall Wheelbase (engine & tender) (ft / m)41.70 / 12.71
Axle Loading (Maximum Weight per Axle) (lbs / kg)
Weight on Drivers (lbs / kg)
Engine Weight (lbs / kg)
Tender Loaded Weight (lbs / kg)
Total Engine and Tender Weight (lbs / kg)
Tender Water Capacity (gals / ML)1584 / 6
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT)15.40 / 14
Minimum weight of rail (calculated) (lb/yd / kg/m)
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)70.90 / 1800
Boiler Pressure (psi / kPa)169.70 / 11.70
High Pressure Cylinders (dia x stroke) (in / mm)16.54" x 25.2" / 420x640 (4)
Tractive Effort (lbs / kg)28,051 / 12723.73
Factor of Adhesion (Weight on Drivers/Tractive Effort)
Heating Ability
Tubes (number - dia) (in / mm)168 - 1.969" / 50
Flues (number - dia) (in / mm)21 - 5" / 127
Flue/Tube length (ft / m)12.86 / 3.92
Firebox Area (sq ft / m2)172.22 / 16
Grate Area (sq ft / m2)33.91 / 3.15
Evaporative Heating Surface (sq ft / m2)1640 / 152.35
Superheating Surface (sq ft / m2)325 / 30.15
Combined Heating Surface (sq ft / m2)1965 / 182.50
Evaporative Heating Surface/Cylinder Volume130.85
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation5755
Same as above plus superheater percentage6733
Same as above but substitute firebox area for grate area34,194
Power L18681
Power MT

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