k.u.k. HB VI Series Locomotive JDZ 91

Military Occupation of Bosnia and Herzegovina (Manufactured 1913 and 1916)

Variously called SDŽ 500 / kukHB VI / SHS VIc7 / JDŽ 91 / JŽ 91

Used for the East Bosnian railway, over the Šargan-Gebirge (Šarganska osmica - Šarganska eight). Built in 1913 and the 2nd series in 1916. They were able to carry 350 tons at a gradient of 15 ‰ and a trailer load of 28 ‰ 180 tons at an average speed of 15 km / h. The locomotives of the SDŽ 500 series were heavy wet steam mallet tank locomotives with the wheel arrangement (1'C)'C in Bosnian gauge, which were built in 1913 by Borsig for the then Serbian State Railways Srpske Državne Železnice (SDŽ). The Yugoslav State Railways (JDŽ) designated the wet steam mallets as the JDŽ 91 series.

In 1913, the Srpske Državne Železnice (SDŽ) procured five heavy wet-steam mallet locomotives from Borsig in Berlin for the narrow-gauge line from Paraćin to Zaječar . They were able to tow 350 tons on a 15 ‰ gradient and 180 tons on a 28 ‰ gradient at an average speed of 15 km/h. In order to make it easier to navigate curves with a 60 meter radius, the running axle and the first coupled axle were connected to a Krauss-Helmholtz bogie and the wheel flangeweakened the first coupling axis of the rear engine. The two frame parts were connected by a single pin and a joint piece. Control is based on the Heusinger system .

Because after the occupation of Serbia the existing locomotives were not sufficient to operate the routes taken over, Henschel & Sohn in Kassel built another 46 of the proven Mallet locomotives for the Imperial and Royal Vienna Transport Line, 34 of which were intended for the Imperial and Royal Army Railway South. After the First World War, the 34 locomotives, like the first series, came to the railways of the Kingdom of Serbs, Croats and Slovenes (SHS). There they were classified as VIc7 along with other mallet locomotives according to the BHStB series scheme. On the Yugoslav State Railways (JDŽ) they were given the designation JDŽ 91 in 1933 and ran mainly on the Bosnian Eastern Railway and further over the Šargan Mountainsfrom Sarajevo to Uzice.

Further machines of the second series were stationed in October 1918 at the military railway in Klausen in South Tyrol and came to Italy after the war. Since there was no use for locomotives with 760 mm gauge , the mallets were regauged to 950 mm (Italian meter gauge) and used as FMS 151-159 in Sardinia .

Numbering:

SD 501-505, kuk HB 6002...6045,
SHS 14201-14234, 14250-14254, JD 91-001-038

Manufacturer:

1st series: Borsig

2nd series: Henschel

Year(s):

1st series: 1913

2nd series: 1916

Type :

(1'C)C n4vt

Gauge :

760 mm ( Bosnian Gauge )

Length Over Coupling:

10.9m

Service Mass:

50.9 t

Friction Mass:

45.1 tons

Top Speed:

30 km/h

Coupling Wheel Diameter:

800mm

Type of Control :

Heusinger

Cylinder Diameter:

HD: 350mm

ND: 520mm

Piston Stroke:

400mm

Boiler Overpressure:

13 atm

Grate Surface:

 1.9 m²

Evaporation Heating Surface:

108.8 sqm

Water Supply:

6.0 m³

Fuel Supply:

2.2 tons of coal

Locomotive No. 6025 of the Imperial and Royal Army Railway.  The locomotives of the kuk HB VI series were heavy wet-steam mallet tank locomotives with the wheel arrangement (1'C)'C in Bosnian gauge, built in 1916 by Hendschel & Sohn for the k.u.k. Army Railway South. The Yugoslav State Railways (JDŽ) designated the wet steam mallets as the JDŽ 91 series.

Below: JDŽ 91-031 in Sarajevo.