BHStB IIIa5

The series IIIa5 was a support tender - composite locomotive with three coupled axles and Klose steering gear in Bosnian gauge of the Bosnian-Herzegovinian State Railways (BHStB).

BHStB / BHLB / SHS IIIa5 JDŽ / JŽ 185
BHStB IIIa5 of the first series in 1965 as JŽ 185-025 in Čapljina
Number:	45
Manufacturer:	Krauss , Weitzer
Year of construction (s):	1900-1901
Type :	C2't
Gauge :	760 mm ( Bosnian gauge )
Length over coupling:	11.53 m
Service mass:	35.5 t
Friction mass:	19.5 t
Top speed:	40 km / h
Driving wheel diameter:	900 mm
Impeller diameter:	650 mm
Cylinder diameter:	310/470 mm
Piston stroke:	450 mm
Boiler overpressure:	13 atü
Grate area:	0.94 m²
Evaporation heating surface:	58.4 m²
Tender:	Supporting tender
Water supply:	6.0 m³
Fuel supply:	2.4 t

history

Type sketch

BHStB / BHLB / SHS IIIa5 JDŽ / JŽ 186
JŽ 186-007 of the second series in 1965 in Dubrovnik .
Number:	11
Manufacturer:	Krauss , MÁVAG
Year of construction (s):	1900-1901
Type :	C2't
Gauge :	760 mm ( Bosnian gauge )
Length over coupling:	12.64 m
Service mass:	41 t
Friction mass:	24 t
Top speed:	40 km / h
Driving wheel diameter:	900 mm
Impeller diameter:	650 mm
Cylinder diameter:	340/520 mm
Piston stroke:	450 mm
Boiler overpressure:	13 atü
Grate area:	1.33 m²
Evaporation heating surface:	83.86 m²
Tender:	Supporting tender
Water supply:	6.4 m³
Fuel supply:	2.4 t

For the development of the areas of Bosnia and Herzegovina occupied by Austria from 1878 onwards , narrow-gauge railways with the so-called Bosnian gauge were built. Curving locomotives with Klose steering axles were used on these routes with steep gradients and tight bends . The first of these locomotives were designated as series IIIa4 and were twin locomotives with simple use of steam expansion. To improve performance, the BHStB decided to purchase composite locomotives .

In 1900 and 1901 45 units were delivered to the Bosnian-Herzegovinian State Railways, which were later designated as the JDŽ 185 series by the Yugoslav State Railways (JDŽ). From 1901 a second series of eleven similar but reinforced III5a were procured, the later JDŽ series 186.

Because of the joint administration by the Austrian and Hungarian halves of Bosnia-Herzegovina, part of the first series was delivered by Weitzer János in Arad and part of the second series by the Budapest machine works (MÁVAG). The other machines are being assembled Linz from Krauss .

The deliveries of Klose locomotives were completed with the IIIa5 series. In total, the railways in Bosnia-Herzegovina procured 99 pieces, a uniquely high number. Their long service life shows that the Klose locomotives have proven themselves in tough conditions.

Constructive features

The IIIa5 series locomotives were built similarly to their IIIa4 predecessors. But they were equipped with a two-cylinder compound drive , vertical valve boxes and Allan controls . The two-axle Krauss support tender enabled significantly larger water and coal containers, both of which could be accommodated on it. The high chimney and the distinctive exhaust sound of the compound engine gave the IIIa5 series the nickname Top (cannon).

Designation and numbering

First series (JDŽ 185)

Construction year	Manufacturer	BHStB number BHLB no. from 1908 SHS no. from 1918	JDŽ number from 1933
1900	Krauss Linz	III5a 301-302	185-001-002
		III5a 303	-
		III5a 304-305	185-004-005
1900	Weitzer	III5a 306-308	185-006-008
1900	Krauss Linz	III5a 309-311	185-009-011
1900	Weitzer	III5a 312-321	185-012-021
		III5a 322-323	-
		III5a 324-325	185-024-025
1901	Krauss Linz	III5a 326-335	185-026-035
1901	Weitzer	III5a 336-341	185-036-041
		III5a 342-343	185-022-023
		III5a 344	-
		III5a 345	185-003

Second series (JDŽ 186)

Construction year	Manufacturer	BHStB number BHLB no. from 1908 SHS no. from 1918	JDŽ number	Remarks
1901	Krauss Linz	III5a 801	186-001	Whereabouts: FS
		III5a 802	186-002
		III5a 803	186-003	Whereabouts: HDŽ, JDŽ; discarded in 1949
		III5a 804-806	186-004-806
1902	Krauss Linz	III5a 807	186-007
1904	MÁVAG	III5a 808	186-008	Whereabouts: HDŽ, JDŽ; discarded in 1949
		III5a 809	186-009	Whereabouts: HDŽ, JDŽ
		III5a 810	186-010	Whereabouts: HDŽ, JDŽ; discarded in 1949
		III5a 811	186-011

swell

• Raimar Lehmann: Steam locomotive special designs . Springer, Basel, ISBN 978-3-0348-6757-3 .
• Johann Rihosek : The locomotives of the Bosnian-Herzegovinian state railways . Reprint 2006, Vienna.
• Werner Schiendl , Franz Gemeinböck: The railways in Bosnia and Herzegovina 1918 - 2016. Edition Bahn im Film, Vienna 2017, ISBN 978-3-9503096-7-6 , p. 64
• Josef Pospichal: Locomotive statistics. JDŽ 185.Retrieved February 1, 2016 . 
• Josef Pospichal: Locomotive statistics. JDŽ 186. Retrieved February 1, 2016 . 
• Ferenc Válóczy: Narrow Gauge in Bosnia. BHLB - Bosnian-Herzegovinian State Railways. Retrieved February 1, 2016 . 

Remarks

1. ↑ ^{a b} Bosnian-Herzegovinian state railways
2. ↑ Hrvatske državne železnice, Croatian State Railways, 1941–1945