kkStB 429

The steam locomotive class kkStB 429 was a class of passenger locomotive operated by the Imperial Royal Austrian State Railways (Kaiserlich-königliche österreichische Staatsbahnen), kkStB.

kkStB 429/429.1 · Südbahn 429 BBÖ 429/429.1 · ČSD 354.7 · FS 688 JDŽ 106 · PKP Ol12 · MÁV 323.9 DRB 35.3 ÖBB 35 · ÖBB 135
PKP Ol12-7 (former kkStB 429.195), August 2014
Number(s)	kkStB: 429.01–429.57 kkStB: 429.100–429.225 SB 429.01–429.06 BBÖ: 429.03–429.57 (with gaps) BBÖ: 429.103–429.224 ČSD: 354.701–354.784 FS: 688.001–688.002 JDŽ: 106-001 – 106-002 PKP: Ol12-1 – Ol12–45, Ol12-84 MÁV: 323.907 DRB: 35 301 – 35 346 ÖBB: 35.242 ÖBB: 135.312–135.346 (with gaps)
Quantity	283
Manufacturer	Lokomotivfabrik der StEG Wiener Neustädter Lokomotivfabrik Lokomotivfabrik Floridsdorf Böhmisch-Mährische Maschinenfabrik
Year(s) of manufacture	1909–1916
Wheel arrangement	2-6-2
Axle arrangement	1′C1′ h2v
Track gauge	1,435 mm (4 ft 8 1⁄2 in)
Height	4,650 mm (15 ft 3 1⁄8 in)
Wheelbase	4,000 mm (13 ft 1 1⁄2 in)
Overall wheelbase	8,030 mm (26 ft 4 1⁄4 in)
Wheelbase incl. tender	13,796 mm (45 ft 3 1⁄4 in)
Empty weight	55.1 t (54.2 long tons; 60.7 short tons)
Service weight	61.2 t (60.2 long tons; 67.5 short tons)
Adhesive weight	43.0 t (42.3 long tons; 47.4 short tons)
Top speed	80 km/h (50 mph)
Driving wheel diameter	1,614 mm (63 1⁄2 in)
Leading wheel diameter	870 mm (34 1⁄4 in)
Trailing wheel diameter	870 mm (34 1⁄4 in)
No. of cylinders	2
LP cylinder bore	690 mm (27 3⁄16 in)
HP cylinder bore	475 mm (18 11⁄16 in)
Piston stroke	720 mm (28 3⁄8 in)
Boiler Overpressure	15 kgf/cm2 (1,470 kPa; 213 lbf/in2)
No. of heating tubes	170
Grate area	3.00 m2 (32.3 sq ft)
Radiative heating area	14.20 m2 (152.8 sq ft)
Tube heating area	85.60 m2 (921.4 sq ft)
Superheater area	28.25 m2 (304.1 sq ft)
Tender	kkStB tender classes 9, 56, 156, 256, 76, 86, 88

kkStB 429.9 BBÖ 429.9 / ČSD 354.7 / FS 688 / JDŽ 106 / PKP Ol12 DRB 35.2 ÖBB 35
ČSD 354.7152 (ex kkStB 429.1996) in the Luzna Railway Museum in 2008
Number(s)	kkStB: 429.900–429.999, 429.1900–429.1996 BBÖ: 429.902–429.995, 429.1926–429.1987, 429.1997 (with gaps) ČSD: 354.785–354.799, 354.7100–354.7152 FS: 688.003–688.028 JDŽ: 106-003 PKP Ol12-46 – Ol12–83, Ol12-85 – Ol12-106 DR: 35 201 – 35 241 ÖBB 35.201–35.241 (with gaps)
Quantity	197
Manufacturer	Lokomotivfabrik Floridsdorf Böhmisch-Mährische Maschinenfabrik Wiener Neustädter Lokomotivfabrik Lokomotivfabrik der StEG
Year(s) of manufacture	1911–1918
Wheel arrangement	2-6-2
Axle arrangement	1′C1′ h2
Track gauge	1,435 mm (4 ft 8 1⁄2 in)
Length	10,548 mm (34 ft 7 1⁄4 in)
Height	4,650 mm (15 ft 3 1⁄8 in)
Wheelbase	4,000 mm (13 ft 1 1⁄2 in)
Overall wheelbase	8,030 mm (26 ft 4 1⁄4 in)
Wheelbase incl. tender	13,844 mm (45 ft 5 in)
Empty weight	55.1 t (54.2 long tons; 60.7 short tons)
Service weight	61.2 t (60.2 long tons; 67.5 short tons)
Adhesive weight	43.0 t (42.3 long tons; 47.4 short tons)
Top speed	80 km/h (50 mph)
Driving wheel diameter	1,614 mm (63 1⁄2 in)
Leading wheel diameter	870 mm (34 1⁄4 in)
Trailing wheel diameter	870 mm (34 1⁄4 in)
No. of cylinders	2
Cylinder bore	475 mm (18 11⁄16 in)
Piston stroke	720 mm (28 3⁄8 in)
Boiler Overpressure	15 kgf/cm2 (1,470 kPa; 213 lbf/in2)
No. of heating tubes	170
Grate area	3.00 m2 (32.3 sq ft)
Radiative heating area	14.20 m2 (152.8 sq ft)
Tube heating area	85.60 m2 (921.4 sq ft)
Superheater area	28.25 m2 (304.1 sq ft)
Tender	kkStB tender classes 9, 56, 156, 256, 76, 86, 88

As Wilhelm Schmidt's superheater went into series production, Karl Gölsdorf modified the Class 329 into the superheated variant 429. The smokebox was lengthened, the boiler barrel reduced accordingly, high-pressure cylinder was given piston valves, the low-pressure cylinder slide valves. The Lokomotivfabrik Floridsdorf, the Wiener Neustädter Lokomotivfabrik and the Lokomotivfabrik der StEG delivered 57 units (429.01–429.57) to the kkStB.

In spite of the small superheater area, problems arose with the slide valve on the low-pressure side. As a result, the following 126 engines were supplied with piston valves on both sides (429.100–429.225). At the same time a two-cylinder simple variant with piston valves was tried, of which in the end 197 units were procured by the kkStB (429.900–429.999 and 429.1900–429.1996).

The Austrian Southern Railway Company (Südbahn) procured six compound locomotives (with piston valves), that were numbered 429.01–429.06.

The 429s were employed for all duties and with good coal generated up to 1,200 PS (883 kW; 1,180 hp). They were to be found in almost all parts of the Danube Monarchy.

After the First World War the former 429s became Class 354.7 with the ČSD, Class Ol12 in the PKP, Class 106 in the JDŽ, Class 688 in the FS and were also used by the Romanian State Railways retaining their original numbers. A total of 87 units (46 compound, 41 two-cylinder locomotives) remained in the BBÖ. The six Südbahn locomotives came to the MÁV, which gave them the designation 323.901–323.906. In addition, the ex kkStB 429.116, which had gone to the PKP as Ol12-24, went to the MÁV as 323.907, the number of which was later changed to 323.908.

In 1939 the Deutsche Reichsbahn (DRB) reclassified the simple engines as 35 201 – 35 241 and the compounds as 35 301 – 35 346. During the course of the war, several locomotives from the ČSD and JDŽ ended up in the DRB. After the Second World War 46 simple locomotives were left in the ÖBB and became their Class 35, as well as 39 compound engines which became Class 135. The serial numbers were not changed from those allocated by the DRB.