Salzkammergut Local Railway and Scheeberg Railway Z
Austrian Federal Railways (BBÖ) Zz and Austrian Federal Railways class 999
The class Z refers to rack locomotives in the Abt system which had three axles and a pure rack drive. They were based on the H 2/3, which the SLM had built for the Monte Generoso railway. Six locomotives were built for the Salzkammergut-Lokalbahn for use on the Schafberg railway, whose bodies were inclined by 17 percent according to the line. The EWA purchased five more for the Schneeberg railway, which were only inclined by twelve percent.
For downhill running they had an additional water tank to cool the cylinders when the Riggenbach counter-pressure brake was used. The Schneeberg railway equipped its locomotives with petroleum firing from 1900 onwards, which was undone during the First World War. In the fifties they received Giesl ejectors. Today all eleven locomotives are still existing, four of them operational.
Technical data
General
- Built
- 1893-1900
- Manufacturers
- Krauss
- Wheel arrangement
- 4-0-2RT (Abt)
- Gauge
- 1,000 mm (Meter gauge)
Dimensions and weights
- Length
- 4.55 m
- Wheelbase
- 3.17 m
- Service mass
- 18 t
- Adhesion mass
- 0 t
- Rigid wheelbase
- 3.17 m
- Water capacity
- 1,200 l
- Fuel capacity
- 0.6 t (coal)
Boiler
- Grate area
- 0.9 m²
- Firebox surface
- 4.02 m²
- Tube heating surface
- 31.1 m²
- Evaporative heating surface
- 35.12 m²
- Total heating surface
- 35.1 m²
Power plant
- Boiler pressure
- 14 bar
- Expansion type
- simple expansion
- Cylinders
- two, 320 x 600 mm
Power
- Power source
- steam
- Estimated power
- 155 kW (211 PS)
- Top speed
- 12 km/h
Calculated values
- Power-to-weight ratio
- 8.6 kW/t
- Heating Surface Equivalent
- 55.2 m²
- Cylinder volume/HSE
- 1 : 1,747.73
- Grate area/Heating surface
- 1 : 39.02
- Firebox/Tube surface
- 1 : 7.74
