Bavarian B V (articulated)

The articulated variant of the Bavarian B V was an unusual, 0-6-6, steam locomotive in the Royal Bavarian State Railways (Königlich Bayerische Staats-Eisenbahnen).

Bavarian B V (articulated)
Number(s)PHÖNIX
Quantity1
ManufacturerMaffei
Year(s) of manufacture1857
Wheel arrangement0-4-6T
Axle arrangementB3′ n2
Track gauge1,435 mm (4 ft 8 1⁄2 in)
Length over buffers3,809 mm (12 ft 6 in)
Wheelbase2,667 mm (8 ft 9 in)
Overall wheelbase8,534 mm (28 ft 0 in)
Empty weightca. 18 t (18 long tons; 20 short tons)
Service weight incl. tenderca. 45 t (44 long tons; 50 short tons)
Adhesive weightca. 21 t (21 long tons; 23 short tons)
Top speed70 km/h (43 mph)
No. of cylinders2
Cylinder bore306 mm (12 1⁄16 in)
Piston stroke610 mm (24 in)
Boiler Overpressure7 kgf/cm2 (686 kPa; 99.6 lbf/in2)
Grate area1.25 m2 (13.5 sq ft)
Evaporative heating areaca. 90 m2 (970 sq ft)
Water capacity5.66 m3 (1,250 imp gal; 1,500 US gal)
FuelWood, 5 m3 (180 cu ft)

The articulated B V was a four-coupled locomotive built by Maffei at their own expense. It was based on the Class B V but, instead of having a third coupled axle, the back of the engine was supported by the front of the tender, called in German a Stütztender or "supporting tender". This was similar to the earlier Engerth design which articulated the tender with the main locomotive frame, allowing some of the weight of the fuel and water to be carried on the driving wheels to improve adhesion. Because the tender was articulated, rather than directly attached to the frame, the locomotive could traverse relatively sharp curves, while still enjoying the advantage of the additional adhesive weight gain. The articulated B V was not a success; its riding qualities were poor and only one example was produced.

See also

Sources
  • v. Welser, Ludwig (1994). Bayern-Report, Band Nr. 4, Eisenbahn Journal Archiv. Fürstenfeldbruck: Merker. ISBN 3-922404-69-3.
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