Pilatus Railway Bhm 1/2
Switzerland 1886 11 produced
When the Pilatus railway was opened in 1887, it was the steepest rack railway in the world with 48 percent and it still holds this title today. For this the SLM had built nine steam rack railcars with inclined cab and passenger compartments to match the grade of the track. The boiler was mounted laterally on the valley side.
In 1900 and 1909, numbers 10 and 11 were built. 11 had a top speed of 4.4 instead of 3.6 km/h. Later all were superheated and got a revised suspension. Their service ended in 1937 when the Pilatus railway was electrified. No. 9 was used as a catenary-independent service vehicle until 1982. Today it is on display in Lucerne, while 10 can be found in Munich.
Technical data
General
- Built
- 1886-1889, 1900, 1909
- Manufacturers
- SLM
- Wheel arrangement
- 2-0-2RT
- Gauge
- 800 mm (800 mm)
Dimensions and weights
- Length
- 10.30 m
- Wheelbase
- 6.12 m
- Empty mass
- 9.5 t
- Service mass
- 13.2 t
- Adhesion mass
- 0 t
- Rigid wheelbase
- 6.12 m
- Water capacity
- 880 l
- Fuel capacity
- 0.5 t (coal)
Boiler
- Grate area
- 0.4 m²
- Firebox surface
- 2.4 m²
- Tube heating surface
- 18.6 m²
- Evaporative heating surface
- 21 m²
- Total heating surface
- 21.0 m²
Power plant
- Driver diameter
- 409 mm
- Boiler pressure
- 12 bar
- Expansion type
- simple expansion
- Cylinders
- two, 220 x 300 mm
Power
- Power source
- steam
- Estimated power
- 50 kW (68 PS)
- Top speed
- 4 km/h
- Starting effort
- 36.2 kN
Calculated values
- Optimal speed
- 8 km/h
- Power-to-weight ratio
- 3.8 kW/t
- Heating Surface Equivalent
- 33.0 m²
- Cylinder volume/HSE
- 1 : 691.15
- Tractive force/Heating surface
- 1 : 36.00
- Grate area/Heating surface
- 1 : 52.50
- Firebox/Tube surface
- 1 : 7.75
