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BBÖ 12
DRB 69.0
ÖBB 69

Type and origin
Power type	Steam
Rebuilder	Lokomotivfabrik Floridsdorf
Rebuild date	1934, 1937
Number rebuilt	2

Specifications
Configuration:
• Whyte	2-2-2T
• UIC	1A1 n2t
Gauge	1,435 mm (4 ft 8+1⁄2 in)
Leading dia.	870 mm (2 ft 10+1⁄4 in)
Driver dia.	1,450 mm (4 ft 9+1⁄8 in)
Trailing dia.	870 mm (2 ft 10+1⁄4 in)
Wheelbase:
• Engine	3.300 m (10 ft 9+7⁄8 in)
Length	7.927 m (26 ft 1⁄8 in) over buffers
Height	3.880 m (12 ft 8+3⁄4 in)
Adhesive weight	13.0 tonnes (12.8 long tons; 14.3 short tons)
Loco weight	32.0 tonnes (31.5 long tons; 35.3 short tons)
Fuel type	Oil
Fuel capacity	1.2 tonnes (1.2 long tons; 1.3 short tons)
Water cap.	4,000 L (880 imp gal; 1,100 US gal)
Firebox:
• Grate area	1.04 m (11.2 sq ft)
Boiler:
• Small tubes	99 off
Boiler pressure	11 kg/cm (156 psi; 1.08 MPa)
Heating surface:
• Firebox	4.35 m (46.8 sq ft)
• Total surface	53.55 m (576.4 sq ft)
Cylinders	2
Cylinder size	345 mm × 480 mm (13+9⁄16 in × 18+7⁄8 in)

Performance figures
Maximum speed	80 km/h (50 mph)

Career
Operators	Bundesbahn Österreich → Deutsche Reichsbahn → Österreichische Bundesbahnen
Numbers	BBÖ 12.01–02 DRB 69 001–002 ÖBB 69.02
Preserved	ÖBB 69.02

The BBÖ 12 was a class of two 2-2-2T express train tank locomotives with the Federal Railway of Austria (Bundesbahnen Österreichs, BBÖ).

Convinced by the performance of the kkStB 112 series, the BBÖ decided in 1934 to procure tank engines for regional express services as well. For reasons of cost however, they achieved this by converting kkStB 97 series 0-6-0 tank locomotives built in 1898 by Krauss/Linz). One unit was converted by the Lokomotivfabrik Floridsdorf in 1934 and another in 1937. Locomotives 97.153 and 97.152 were used for the conversion. The boiler and the valve gear were used unchanged. Oil-firing was provided, the tank for which was installed on the rear section of the boiler barrel, and enabled one-man operation. The engines were given a special livery with the water tanks and driver's cab being painted light green.

The locomotives performed well in service but no more were converted, because from 1935 the BBÖ DT 1 was available for short express trains.

In 1938 the Deutsche Reichsbahn took the engines over as 69 001 and 69 002. Only the latter was still around after the Second World War. It became ÖBB 69.02 in the Austrian Federal Railways (ÖBB) and was used on a bridge inspection train. This engines is still preserved today.

References

Hütter, Ingo (2021). Die Dampflokomotiven der Baureihen 60 bis 91 der DRG, DRB, DB, und DR (in German). Werl: DGEG Medien. pp. 48–49. ISBN 978-3-946594-21-5.
Pospichal, Josef. "BBÖ 12". Lokstatstik. Retrieved 2021-01-30.
Schröpfer, Heribert (1989). Triebfahrzeuge österreichischer Eisenbahnen - Dampflokomotiven BBÖ und ÖBB. Düsseldorf: alba. ISBN 3-87094-110-3.

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References