SNCFV Beyer-Garratt Locomotives in Belgium


Class Details by Steve Llanso of Sweat House Media

Class 850 (Locobase 557)

Data from A[rthur] E[dward] Durrant, Garratt Locomotives of the World (revised edition) (Newton Abbott, UK: David & Charles, 1981), p. 43, 45.. Works numbers were 2121 in 1929 and 2140 in 1930.

Hands down, these Garratts presented the most unusual appearance of any Garratt. Fully enclosed for roadside tramways.Effecitvely hiding any hint of the Garratt layout, the engines appeared to be large buses complete with flat front windows, lines of windows along each side, and a shroud over the front water tank.

Contrary to their appearance, however, the pair hauled loads of sugar beets, clay, or coal on the Tongres-Mauseik and Vroenha\uven-St Trond lines. Train loads amounted to 175 tons up a 1 1/2-mile (2.4 km) 2% grade at 12 1/2 mph (20 kph). The alignment was pinched by a minium curve radius of 98 ft as it wound along many of the highways of Belgium.

Apparently unsuccessful, both tram Garratts had been mothballed by 1933.

Principal Dimensions by Steve Llanso of Middle Run Media
Class850
Locobase ID557
RailroadSNCFV
CountryBelgium
Whyte0-6-0+0-6-0
Number in Class2
Road Numbers850, 851
GaugeMetre
Number Built2
BuilderSA Saint Leonard
Year1929
Valve Gear
Locomotive Length and Weight
Driver Wheelbase (ft / m)21.33 / 6.50
Engine Wheelbase (ft / m)45.58 / 13.89
Ratio of driving wheelbase to overall engine wheelbase 0.47
Overall Wheelbase (engine & tender) (ft / m)
Axle Loading (Maximum Weight per Axle) (lbs / kg)22,046 / 10,000
Weight on Drivers (lbs / kg)127,890 / 58,010
Engine Weight (lbs / kg)127,890 / 58,010
Tender Loaded Weight (lbs / kg)
Total Engine and Tender Weight (lbs / kg)
Tender Water Capacity (gals / ML)900 / 3.41
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) 2.80 / 3
Minimum weight of rail (calculated) (lb/yd / kg/m)36 / 18
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)33.50 / 851
Boiler Pressure (psi / kPa)188.50 / 1300
High Pressure Cylinders (dia x stroke) (in / mm)14.17" x 13.78" / 360x350 (4)
Tractive Effort (lbs / kg)26,467 / 12005.24
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.83
Heating Ability
Tubes (number - dia) (in / mm)154 - 1.61" / 41
Flues (number - dia) (in / mm)24 - 4.33" / 110
Flue/Tube length (ft / m)
Firebox Area (sq ft / m2)85.40 / 7.94
Grate Area (sq ft / m2)22.30 / 2.07
Evaporative Heating Surface (sq ft / m2)1130 / 105.02
Superheating Surface (sq ft / m2)200 / 18.59
Combined Heating Surface (sq ft / m2)1330 / 123.61
Evaporative Heating Surface/Cylinder Volume224.64
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation4204
Same as above plus superheater percentage4834
Same as above but substitute firebox area for grate area18,513
Power L17024
Power MT726.50

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