Bavarian B VI

The Bavarian B VI steam engines were locomotives with the Royal Bavarian State Railways (Königlich Bayerische Staatsbahn).[1]

Bavarian B VI
Model of the B VI, No. 418 Hans Sachs
Number(s)266 MOOSBURG to
496 BÜRGER
(not consecutive)
DRG 34 7461 - 34 7462 (provisional no. scheme)
Quantity107 (57 in Series 1, 50 in Series 2)
ManufacturerMaffei
Year(s) of manufacture1863–1871
Retired1896–1923
Wheel arrangement2-4-0
Axle arrangement1B n2
Track gauge1,435 mm (4 ft 8 1⁄2 in)
Length over buffers13,310–13,800 mm (43 ft 8 in–45 ft 3 1⁄4 in)
Service weight30.0–33.5 t (29.5–33.0 long tons; 33.1–36.9 short tons)
Adhesive weight21.5–24.2 t (21.2–23.8 long tons; 23.7–26.7 short tons)
Axle load10.7–12.1 t (10.5–11.9 long tons; 11.8–13.3 short tons)
Top speed75 km/h
Driving wheel diameter1,600–1,620 mm (5 ft 3 in–5 ft 3 3⁄4 in)
Leading wheel diameter1,118–1,150 mm (3 ft 8 in–3 ft 9 1⁄4 in)
No. of cylinders2
Cylinder bore406 mm (16 in)
Piston stroke610 mm (24 in)
Boiler Overpressure8 or 10 kgf/cm2 (785 or 981 kPa; 114 or 142 lbf/in2)
Grate area1.24 m2 (13.3 sq ft)
Evaporative heating area90.20–91.40 m2 (970.9–983.8 sq ft)
Tender3 T 9/9,6
Water capacity9.0 or 9.6 m3 (2,000 or 2,100 imp gal; 2,400 or 2,500 US gal)

This class was a development of the B V; its dimensions, heating area and grate area being almost the same, only the driving wheel diameter being larger.[2] It was built in two series.

Series 1 delivered 57 locomotives in four batches which had a boiler overpressure of 8 bar. The first two batches, delivered in 1863 and 1864, had a large goblet-shaped smokestack and open driver's platform with a windshield. Batches 3 and 4, delivered from 1865 to 1867 added a roof over the driver's platform; the smokestacks were now cylindrical or pear-shaped and an injector and pump for the feedwater.[3]

On the second series of five batches, the boiler overpressure was raised to 10 bar. The first two batches (delivered 1867 - 1869), unusually, were peat-fired and hauled a covered peat tender. The first batch had side windows on the driver's cab and cylindrical or funnel-shaped chimneys. The second batch (see illustration of ORLANDO DI LASSO) lost the side windows again. Batches three and four, delivered in 1870, were a mix of peat-fired engines with funnel smokestacks and coal-fired engines with conical chimneys. The final batch of 6 engines, delivered in 1871, were peat-fired with funnel smokestacks and no side windows and rounded corners to the cabs.[4]

The last two examples remaining in service (422 WREDE and 432 MARKTL) were transferred to the ownership of the Reichsbahn in 1920 and were listed in the DRG's 1923 provisional renumbering plan as nos. 34 7461 and 34 7462. However the renumbering was never carried out because they had retired by 1923.

They were coupled to Bavarian 3 T 9 and 3 T 9.6 tenders.

See also

References
  1. von Welser 1994, pp. 70-85.
  2. von Welser 1994, p. 70.
  3. von Welser 1994, p. 82.
  4. von Welser 1994, p. 83.

Sources
  • von Welser, Ludwig (1994). Bayern-Report, Band No. 4 - Die Gattungen AI bis A V, B I Bis B VI, C I und C II. Fürstenfeldbruck: Hermann Merkur Verlag. ISBN 3-922404-69-3.
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