StEG 0-4-6 Locomotives in Austria

Class Details by Steve Llanso of Sweat House Media

Class II / MAv 250 / kKStB 14 (Locobase 9580)

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 class, delivered over an 8-year period, took advantage of the all-adhesion layout to increase driver diameter for greater speed.

In 1891, 37 of the class were incorporated in the Magyar -llamvasutak, the Hungarian State Railway, as MAV 250. In 1909, the absorption of all Austrian railways into the kKStB led to the 27 engines on those railways being designated as the 14 class.

All were retired by the end of World War One.

Principal Dimensions by Steve Llanso of Sweat House Media

ClassII / MAv 250 / kKStB 14
Locobase ID9580
RailroadStEG (kKStB)
Number in Class93
Road Numbers178-270
Number Built93
Valve Gear
Locomotive Length and Weight
Driver Wheelbase (ft / m) 8.64 / 2.63
Engine Wheelbase (ft / m)27.29 / 8.32
Ratio of driving wheelbase to overall engine wheelbase 0.32
Overall Wheelbase (engine & tender) (ft / m)27.29 / 8.32
Axle Loading (Maximum Weight per Axle) (lbs / kg)
Weight on Drivers (lbs / kg)38,581 / 17,500
Engine Weight (lbs / kg)111,554 / 50,600
Tender Loaded Weight (lbs / kg)
Total Engine and Tender Weight (lbs / kg)111,554 / 50,600
Tender Water Capacity (gals / ML)
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT)
Minimum weight of rail (calculated) (lb/yd / kg/m)32 / 16
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)62.20 / 1580
Boiler Pressure (psi / kPa)130.50 / 9
High Pressure Cylinders (dia x stroke) (in / mm)16.22" x 22.8" / 412x579
Tractive Effort (lbs / kg)10,697 / 4852.08
Factor of Adhesion (Weight on Drivers/Tractive Effort) 3.61
Heating Ability
Tubes (number - dia) (in / mm)
Flues (number - dia) (in / mm)
Flue/Tube length (ft / m)
Firebox Area (sq ft / m2)86.08 / 8
Grate Area (sq ft / m2)12.91 / 1.20
Evaporative Heating Surface (sq ft / m2)1345 / 125
Superheating Surface (sq ft / m2)
Combined Heating Surface (sq ft / m2)1345 / 125
Evaporative Heating Surface/Cylinder Volume246.67
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation1685
Same as above plus superheater percentage1685
Same as above but substitute firebox area for grate area11,233
Power L14405
Power MT503.43

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