StEG / M-V 0-4-6 Locomotives in Austria

Class Details by Steve Llanso of Sweat House Media

Class IVg / M-V 268 (Locobase 9581)

Data from [], last accessed 28 September 2008.

Locobase 544 describes the Engerth system of augmenting adhesion by cogs driving the three axles of the tender. This long-lasting octet had relatively high drivers and low boiler pressure, which limited tractive effort no matter how many wheels were providing traction.

When they entered service, the engines were named ANINA, NERA, LAGERDORF, SZOLNAK, AROSZBAMAS, SZ+R+GH, SZT. ENDRE, and TETRINIA. By 1873 they had been renumbered 57-64 and ultimately received a Hungarian Railways class ID.

Principal Dimensions by Steve Llanso of Sweat House Media

ClassIVg / M-V 268
Locobase ID9581
RailroadStEG / M-V
Number in Class8
Road Numbers170-177
Number Built8
Valve Gear
Locomotive Length and Weight
Driver Wheelbase (ft / m) 8.65 / 2.64
Engine Wheelbase (ft / m)20.47 / 6.24
Ratio of driving wheelbase to overall engine wheelbase 0.42
Overall Wheelbase (engine & tender) (ft / m)20.47 / 6.24
Axle Loading (Maximum Weight per Axle) (lbs / kg)
Weight on Drivers (lbs / kg)
Engine Weight (lbs / kg)110,782 / 50,250
Tender Loaded Weight (lbs / kg)
Total Engine and Tender Weight (lbs / kg)110,782 / 50,250
Tender Water Capacity (gals / ML)
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT)
Minimum weight of rail (calculated) (lb/yd / kg/m)
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)68.40 / 1738
Boiler Pressure (psi / kPa)89.90 / 6.20
High Pressure Cylinders (dia x stroke) (in / mm)16.57" x 21.93" / 421x557
Tractive Effort (lbs / kg)6727 / 3051.32
Factor of Adhesion (Weight on Drivers/Tractive Effort)
Heating Ability
Tubes (number - dia) (in / mm)
Flues (number - dia) (in / mm)
Flue/Tube length (ft / m)
Firebox Area (sq ft / m2)80.70 / 7.50
Grate Area (sq ft / m2)13.45 / 1.25
Evaporative Heating Surface (sq ft / m2)1302 / 121
Superheating Surface (sq ft / m2)
Combined Heating Surface (sq ft / m2)1302 / 121
Evaporative Heating Surface/Cylinder Volume237.88
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation1209
Same as above plus superheater percentage1209
Same as above but substitute firebox area for grate area7255
Power L13193
Power MT

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