Bosnia-Herzogovina 2-6-2 Locomotives in Austria
Class Details by Steve Llanso of Sweat House Media
Class IIIb5/73 (Locobase 4805)
Data from A E Durrant The Steam Locomotives of Eastern Europe (Newton Abbot:David & Charles, 1972).
This was an express locomotive that was rated at up to 60 kph (38 mph), quite a speed for the Bosnian countryside through which it ran. The particular example preserved at the Frojach Museum remained in service into the 1970s. (See [
]).
| Principal Dimensions by Steve Llanso of Middle Run Media | |
|---|---|
| Class | IIIb5/73 |
| Locobase ID | 4805 |
| Railroad | Bosnia-Herzogovina |
| Country | Austria |
| Whyte | 2-6-2 |
| Number in Class | 23 |
| Road Numbers | 151-173 |
| Gauge | 76 cm |
| Number Built | 23 |
| Builder | MAVAG |
| Year | 1913 |
| Valve Gear | Heusinger |
| Locomotive Length and Weight | |
| Driver Wheelbase (ft / m) | |
| Engine Wheelbase (ft / m) | |
| 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) | 47,620 / 21,600 |
| Engine Weight (lbs / kg) | 67,461 / 30,600 |
| Tender Loaded Weight (lbs / kg) | |
| Total Engine and Tender Weight (lbs / kg) | |
| Tender Water Capacity (gals / ML) | 1320 / 5 |
| Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | 2.20 / 2 |
| Minimum weight of rail (calculated) (lb/yd / kg/m) | 26 / 13 |
| Geometry Relating to Tractive Effort | |
| Driver Diameter (in / mm) | 47.20 / 1200 |
| Boiler Pressure (psi / kPa) | 174 / 1200 |
| High Pressure Cylinders (dia x stroke) (in / mm) | 14.57" x 17.72" / 370x450 |
| Tractive Effort (lbs / kg) | 11,787 / 5346.50 |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 4.04 |
| Heating Ability | |
| Tubes (number - dia) (in / mm) | 99 - 1.732" / 44 |
| Flues (number - dia) (in / mm) | 15 - 4.764" / 121 |
| Flue/Tube length (ft / m) | 12.14 / 3.70 |
| Firebox Area (sq ft / m2) | 60.71 / 5.64 |
| Grate Area (sq ft / m2) | 16.68 / 1.55 |
| Evaporative Heating Surface (sq ft / m2) | 833 / 77.42 |
| Superheating Surface (sq ft / m2) | 175 / 16.26 |
| Combined Heating Surface (sq ft / m2) | 1008 / 93.68 |
| Evaporative Heating Surface/Cylinder Volume | 243.60 |
| Computations Relating to Power Output (More Information) | |
| Robert LeMassena's Power Computation | 2902 |
| Same as above plus superheater percentage | 3396 |
| Same as above but substitute firebox area for grate area | 12,359 |
| Power L1 | 10,854 |
| Power MT | 1507.49 |