Oesterreichische Nordwestbahn 2-4-0 Locomotives in Austria


Class Details by Steve Llanso of Sweat House Media

Class VIII / 389 (Locobase 7801)

Data from [], last accessed 27 August 2006.

Four 0-4-0T tank engines helped the contractors build the ONWB's Vienna station. After it was complete, the line had no real need for such small locomotives, says Wikipedia's author, so the ONWB added a leading axle. By 1886, the date of this entry, the design's heating surface area had grown by 29.1 sq m and its grate by 0.5 sq m.

In this form, they continued in service into the 1900s. 482 & 484 retired in 1909,while 481 and 483 remained until 1912 and 1915.

Principal Dimensions by Steve Llanso of Sweat House Media

ClassVIII / 389
Locobase ID7801
RailroadOesterreichische Nordwestbahn
CountryAustria
Whyte2-4-0T
Number in Class4
Road Numbers1-4 / 481-484
GaugeStd
Number Built4
BuilderSigl
Year1888
Valve Gear
Locomotive Length and Weight
Driver Wheelbase (ft / m) 8.30 / 2.53
Engine Wheelbase (ft / m)15.73 / 4.79
Ratio of driving wheelbase to overall engine wheelbase 0.53
Overall Wheelbase (engine & tender) (ft / m)
Axle Loading (Maximum Weight per Axle) (lbs / kg)
Weight on Drivers (lbs / kg)52,911 / 24,000
Engine Weight (lbs / kg)79,366 / 36,000
Tender Loaded Weight (lbs / kg)
Total Engine and Tender Weight (lbs / kg)79,366 / 36,000
Tender Water Capacity (gals / ML)660 / 2.50
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT)
Minimum weight of rail (calculated) (lb/yd / kg/m)44 / 22
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)47 / 1195
Boiler Pressure (psi / kPa)145 / 10
High Pressure Cylinders (dia x stroke) (in / mm)13.46" x 22.83" / 342x580
Tractive Effort (lbs / kg)10,846 / 4919.67
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.88
Heating Ability
Tubes (number - dia) (in / mm)
Flues (number - dia) (in / mm)
Flue/Tube length (ft / m)
Firebox Area (sq ft / m2)61.33 / 5.70
Grate Area (sq ft / m2)12.91 / 1.20
Evaporative Heating Surface (sq ft / m2)944 / 87.70
Superheating Surface (sq ft / m2)
Combined Heating Surface (sq ft / m2)944 / 87.70
Evaporative Heating Surface/Cylinder Volume251.07
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation1872
Same as above plus superheater percentage1872
Same as above but substitute firebox area for grate area8893
Power L13778
Power MT314.83

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