Bavarian PtzL 3/4

The Bavarian Class PtzL 3/4 engines with the Royal Bavarian State Railways (Königlich Bayerische Staats-Eisenbahnen) were rack railway locomotives whose cogwheel drive was designed for working on tracks with a Strub rack. In 1923 they were incorporated by the Deutsche Reichsbahn as DRG Class 97.1 (Baureihe 97.1) in their numbering plan. The locomotives remained on their regular route between Erlau and Wegscheid until the closure of this rack railway in 1963. The last journey was on 5 January 1963. They were scrapped in April 1964 at Simbach am Inn.

Bavarian PtzL 3/4
DRG Class 97.1
Number(s)4101–4103 + 8033
DRG 97 101–104 in Passau shed
Quantity4
ManufacturerKrauss
Year(s) of manufacture29.07/ 30.08 and 17 September 1912, 1923
Retired1963
Wheel arrangement0-6-2
Axle arrangementC1' h2(4v)
TypePtzl
Track gauge1,435 mm (4 ft 8 1⁄2 in)
Length over buffers10,490 mm
Service weight57.8 t
Adhesive weight46.2 t
Axle load15.6 t
Top speed45km/h adhesive, 12km/h cogwheel
Indicated Power390 kW/ 530PSi adhesive, 560PSi cogwheel
Driving wheel diameter1,006 mm
Trailing wheel diameter800 mm
Rack systemEmil Strub
No. of cylinders2
Cylinder bore508 mm
Piston stroke460 mm
Boiler Overpressure12 bar
Grate area1.85 m2
Superheater area25.40 m2
Evaporative heating area71.69 m2
Fuelcoal
Transmissionsuperheated steam, 2 cylinders in adhesive working, 4 cylinders in cogwheel mode
CouplersStandard buffers with coupling hooks

See also
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