PB Bhm 1/2

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PB Bhm 1/2
Steam railcar Bhm 1/2 of the Pilatusbahn
Steam railcar Bhm 1/2 of the Pilatusbahn
Numbering: Bhm 1/2 1-11
Number: 11
Manufacturer: SLM
Year of construction (s): 1886–1889, 1900, 1909
Retirement: 1981
Axis formula : 2z
Gauge : 800 mm
Length over buffers: 10,300 mm
Total wheelbase: 6,120 mm
Empty mass: 9.5 t
Service mass: 13.2 t
Top speed: 3.6 / 4.4 km / h (uphill)
3 km / h (downhill)
Driving wheel diameter: 409 mm
Gear system : Perforator
Cylinder diameter: 220 mm
Piston stroke: 300 mm
Cylinder d. Gear drive: 220 mm
Boiler overpressure: 12 bar
Number of heating pipes: 130
Grate area: 0.40 m²
Radiant heating surface: 2.40 m²
Evaporation heating surface: 21.0 m²
Gradient: 480 ‰
Seats: 32

The Bhm 1/2 were steam railcars that were used on the Pilatus Railway between 1889 and 1981.

history

SLM data sheet, 3 pages with technical data and factory photo

Cars 1–9 were procured when the line opened in 1886–1889. The manufacturer was the Swiss locomotive and machine factory in Winterthur . The railcars 10 (1900) and 11 (1909) were added later. Compared to its predecessors, car 11 reached a higher maximum speed, but the rest of the data was identical.

Most of the railcars were in service until the conversion to electrical operation in 1937. With the exception of steam railcars 9 and 10, the remaining vehicles were scrapped in the same year. Car 9 remained with the Pilatusbahn as a reserve until 1981 and has since been exhibited in the Swiss Museum of Transport in Lucerne , Car 10 is on permanent loan from the Swiss Museum of Transport to the German Museum in Munich .

technology

The drive was installed on the valley side of the car. The cylinders and pistons are located on both sides of the car and drive the vertically arranged drive axles via a bevel gear ratio. The cars were later converted for superheated steam operation and cushioned against the vibrations of the steam engine .

Since the operation was very expensive in the long run and the maintenance increased steadily, there were already considerations in 1905 to convert the operation to electrical operation with overhead lines , but this was only realized in 1937.

gallery

  • SLM data sheet

  • Ready to go at the valley station in 1889 (promotional photo Pilatusbahn)

  • Illustration from an English book circa 1910

  • Car No. 10 in the Deutsches Museum Verkehrszentrum Munich

literature

Web links

Commons : Pilatusbahn-Steam  - collection of images, videos and audio files