Wien-Raaber Bahn 4-2-0 Locomotives in Austria

Class Details by Steve Llanso of Sweat House Media

Class Weilburg (Locobase 7784)

Data from [], accessed 16 August 2006.

Although obliged to use the same layout as the Wien II because of the factory's inability to forge a crank axle, the Weilburg was substantially larger. One can see that the haystack firebox was already proving to be a limiting factor as the direct heating surface percentage dropped considerably.

Taken into the Sndlichen Staatsbahn in 1853, the Weilburg was scrapped in 1858 while the Brandhof took the Sndbahn's number (SB 860) before its retirement in 1860.

Class Wien II (Locobase 7783)

Data from [], accessed 16 August 2006.

These were among the very first locomotives to run in Austria and possibly the largest class up to the time. Their names were Wien II, Hietzing, Schoenbrunn, Belvedere, Lichtenstein, and Altmannsdorf. The Wikipedia entry notes that the 4-2-0 layout with outside cylinders and drive was chosen because the builder couldn't yet provide a crank axle. The profile shows a haystack firebox and tall, flaring, smoke-arresting stack.

An earlier locomotive named Wien was renamed Pressburg. Schonbrunn suffered a boiler explosion in 1847 while the other five wound up on the Sndlichen Staatsbahn in 1853 from which they were retired in 1857.

Principal Dimensions by Steve Llanso of Sweat House Media

ClassWeilburgWien II
Locobase ID7784 7783
RailroadWien-Raaber BahnWien-Raaber Bahn
Number in Class26
Road Numbers
Number Built26
Valve Gear
Locomotive Length and Weight
Driver Wheelbase (ft / m)
Engine Wheelbase (ft / m) 9.06 / 2.76 9.33 / 2.84
Ratio of driving wheelbase to overall engine wheelbase
Overall Wheelbase (engine & tender) (ft / m)
Axle Loading (Maximum Weight per Axle) (lbs / kg)
Weight on Drivers (lbs / kg)27,756 / 12,59023,325 / 10,580
Engine Weight (lbs / kg)44,423 / 20,15037,038 / 16,800
Tender Loaded Weight (lbs / kg)
Total Engine and Tender Weight (lbs / kg)
Tender Water Capacity (gals / ML)
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT)
Minimum weight of rail (calculated) (lb/yd / kg/m)46 / 2339 / 19.50
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)58.10 / 147549.80 / 1265
Boiler Pressure (psi / kPa)78.30 / 5.4078.20 / 5.40
High Pressure Cylinders (dia x stroke) (in / mm)13" x 20.75" / 330x52710.63" x 17.64" / 270x448
Tractive Effort (lbs / kg)4017 / 1822.082660 / 1206.56
Factor of Adhesion (Weight on Drivers/Tractive Effort) 6.91 8.77
Heating Ability
Tubes (number - dia) (in / mm)
Flues (number - dia) (in / mm)
Flue/Tube length (ft / m)
Firebox Area (sq ft / m2)50.57 / 4.7033.36 / 3.10
Grate Area (sq ft / m2) 9.36 / 0.87 8.50 / 0.79
Evaporative Heating Surface (sq ft / m2)576 / 53.50360 / 33.46
Superheating Surface (sq ft / m2)
Combined Heating Surface (sq ft / m2)576 / 53.50360 / 33.46
Evaporative Heating Surface/Cylinder Volume180.69198.68
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation733665
Same as above plus superheater percentage733665
Same as above but substitute firebox area for grate area39602609
Power L119711887
Power MT156.55178.35

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