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

BBÖ 12
DRB 69.0
ÖBB 69
Type and origin
Power typeSteam
RebuilderLokomotivfabrik Floridsdorf
Rebuild date1934, 1937
Number rebuilt2
Specifications
Configuration:
 • Whyte2-2-2T
 • UIC1A1 n2t
Gauge1,435 mm (4 ft 8+12 in)
Leading dia.870 mm (2 ft 10+14 in)
Driver dia.1,450 mm (4 ft 9+18 in)
Trailing dia.870 mm (2 ft 10+14 in)
Wheelbase:
 • Engine3.300 m (10 ft 9+78 in)
Length7.927 m (26 ft 18 in) over buffers
Height3.880 m (12 ft 8+34 in)
Adhesive weight13.0 tonnes (12.8 long tons; 14.3 short tons)
Loco weight32.0 tonnes (31.5 long tons; 35.3 short tons)
Fuel typeOil
Fuel capacity1.2 tonnes (1.2 long tons; 1.3 short tons)
Water cap.4,000 L (880 imp gal; 1,100 US gal)
Firebox:
 • Grate area1.04 m2 (11.2 sq ft)
Boiler:
 • Small tubes99 off
Boiler pressure11 kg/cm2 (156 psi; 1.08 MPa)
Heating surface:
 • Firebox4.35 m2 (46.8 sq ft)
 • Total surface53.55 m2 (576.4 sq ft)
Cylinders2
Cylinder size345 mm × 480 mm (13+916 in × 18+78 in)
Performance figures
Maximum speed80 km/h (50 mph)
Career
Operators
Numbers
  • BBÖ 12.01–02
  • DRB 69 001–002
  • ÖBB 69.02
PreservedÖBB 69.02

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.

See also

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References

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  • 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.