Bosnian-Herzegovinian Railway class IVa5
Yugoslav Railway class 83 and Hungarian State Railways series 483
After several locomotives had been built in smaller numbers for the narrow-gauge lines in Austria-Hungary, the breakthrough as a standard locomotive was achieved with the IVa5. It was built as a tender locomotive with a 0-8-2 wheel arrangement, initially with a compound engine and later as a superheated simple engine. They are technically related to the Mh/Mv of the NÖLB. Some were built for the meter gauge for use in Hungary.
Even after the end of the Austro-Hungarian monarchy, production continued for the railways of the SHS state and Yugoslavia. A total of 185 had been built by 1949, of which 169 were still in use in 1965. Even today, some are still in use on museum railways, including the Austrian Club 760. Two are used on the Banovići coal railway today, as they are more powerful in shunting than the existing diesel locomotives.
Technical data
General
| Property | compound | superheated |
|---|---|---|
| Built | 1903-1949 | |
| Manufacturers | Krauss Linz, MÁVAG, Jung, Đ, uro Đ, aković | |
| Wheel arrangement | 0-8-2 (River Irt) | |
| Gauge | 760 mm (Bosnian gauge); 1,000 mm (Meter gauge) | |
Dimensions and weights
| Property | compound | superheated |
|---|---|---|
| Length | 13.70 m | |
| Service mass | 36.6 t | 38 t |
| Adhesion mass | 32 t | 32.5 t |
| Total mass | 52 t | 54 t |
Boiler
| Property | compound | superheated |
|---|---|---|
| Grate area | 1.75 m² | 1.7 m² |
| Firebox surface | 6.4 m² | |
| Tube heating surface | 105 m² | 81.8 m² |
| Evaporative heating surface | 111.4 m² | 88.2 m² |
| Total heating surface | 111.4 m² | 113.1 m² |
| Superheater surface | 24.88 m² | |
Power plant
| Property | compound | superheated |
|---|---|---|
| Driver diameter | 900 mm | |
| Boiler pressure | 13 bar | 12 bar |
| Expansion type | compound | simple expansion |
| Cylinders | two, HP: 370 x 450 mm and LP: 550 x 450 mm | two, 430 x 450 mm |
Power
| Property | compound | superheated |
|---|---|---|
| Power source | steam | |
| Estimated power | 400 kW (544 PS) | 450 kW (612 PS) |
| Top speed | 35 km/h | |
| Starting effort | 52.1 kN | 94.3 kN |
| Starting effort simple | 62.5 kN | |
Calculated values
| Property | compound | superheated |
|---|---|---|
| Factor of adhesion | 1 : 6.03 | 1 : 3.38 |
| Optimal speed | 47 km/h | 29 km/h |
| Power-to-weight ratio | 10.9 kW/t | 11.8 kW/t |
| Heating Surface Equivalent | 143.4 m² | 170.0 m² |
| Cylinder volume/HSE | 1 : 710.19 | 1 : 768.99 |
| Adhesive weight/Total | 1 : 1.14 | 1 : 1.17 |
| Tractive force/Heating surface | 1 : 9.76 | 1 : 17.42 |
| Grate area/Heating surface | 1 : 63.66 | 1 : 66.52 |
| Firebox/Tube surface | 1 : 16.41 | 1 : 12.78 |
| Total/Superheater | 1 : 3.55 |
