The mountain railway: how ist operates

The mountain railway consists of two sections:

  1. The funicular line between Obstfelderschmiede and Lichtenhain
  2. The upland line between Lichtenhain and Cursdorf

When the contract to build a rail line was announced, the connection had to run between Obstfelderschmiede and Cursdorf, i.e. the funicular was an integral part of the route from the very beginning. Today, the line bears the number 6691 in Deutsche Bahn AG's system.

The funicular section uses two different vehicles, a passenger wagon and a freight transporter. The latter can carry rolling stock with a standard gauge and total mass of 27 tonnes.

Its original purpose was to carry freight between the hills around Oberweissbach and Germany's nationwide rail network.

Today, the freight wagon on the transporter's platform has mostly been replaced by what started out as an auxiliary railcar – an open-top carriage that we call our "convertible".

The single-track line uses an Abt-style switch halfway along the route to let the vehicles pass each other. Another Abt switch at the valley station splits the line into two tracks, one leading to the platform for the passenger carriage, the other to the loading ramp for the freight transporter.

There is a turntable at each terminus, giving the line a connection to the larger rail network with its standard-gauge tracks.

Combined, these features have created a funicular railway like no other in the world. Still fully operational today, it is a living monument to technological ingenuity. 

 

Oberweissbach mountain railway: technical data

Planning and overseeing the overall system: Dr. Wolfgang Bäseler

Planning and construction of funicular components: Heckel, Saarbrücken, Germany

Original technical data:

Type:

 

Single-line funicular railway with 2 vehicles and Abt switches

Length:

 

1,387.8 m

Track gauge:

 

1,800 mm (standard gauge: 1,435 mm)

Vertical distance:

 

323 m

Altitude of valley station:

 

340.8 m above sea level

Altitude of summit station:

 

663.8 m above sea level

Gradient:

 

23.92 ... 25%

Speed:

 

1.6 m/s  (5.76 km/h)

Journey time:

 

18 min

Cable diameter: 

 

40 mm (nominal diameter)

Diameter of drive pulleys:

 

4,000 mm each (of 2)

Wrap angle at drive pulleys

 

270° (x2) = 540° total wrap angle

 

Rotational speed of drive pulleys at 1.6 m/s: 

 

7.64 rpm

 Drive system: 2 asynchronous three-speed motors and two drivetrains

  • 110 kW, 3 x 400 V each
  • Max. 935 rpm

Gearing:

  • 2 units 4-stage spur gear and two drivetrains
  • Total gear ratio i = 122.34

Cable:

  • Diameter = 40 mm
  • 6 strands with 25 wires each (incl. 6 cored wires)
  • Compacted with polypropylene inserts
  • Right-hand lang lay
  • 6.28 kg/m

Machine house – the heart of the funicular line

Located in the machine house, the funicular's drive system consists of the following main components:

  • Two asynchronous three-speed motors producing 110 kW each and which move the sheave wheels via the drivetrain. An electronic management unit handles synchronisation.
  • The two sheave wheels are mounted at a right angle to the direction of travel, so two deflecting pulleys change the orientation. The sheave wheels and deflecting pulleys are all 4 metres in diameter. Large loads (freight) can only be moved thanks to this space-saving configuration with the maximum cable wrap angle, thereby producing a substantial contact surface between the cable, the surface of the cable groove and the sheave wheel.

Operating brake and security brake, both of which function as a spring-loading brake. The brakes open hydraulically.

Abt switches – the funicular's special switch system

Abt switches have no moving parts. The passenger carriage has double-flanged wheels on the left-hand side, and it is guided by the left-hand rail. Its roller wheels on the right can simply pass over the cable gap in switch. On the freight transporter, the wheel positions are reversed. It is guided by the right-hand rail, while its roller wheels are located on the left.

The switch type is named after its inventor,

Carl Roman Abt (born 16 July 1850 in Bünzen, died 1 Mai 1933 in Lucerne) was a Swiss engineer, inventor and entrepreneur. He came up with several ground-breaking solutions, such as the Abt system that applies cog and adhesion power for rack railways, and the "self-steering" switch used at Oberweissbach. In addition, he also oversaw the construction of 72 mountain railways around the globe, with Visp-Zermatt, Gornergrat, Furka and Monte Generoso being just some of his projects.

(Photo and information sourced from Wikipedia)

Vehicles on the funicular line

Passenger carriage

The passenger wagon, called "Wagon 1" by the funicular's crew, has undergone only minor modifications since the line opened in 1923. The changes were made at both ends, which were given a curved shape and larger windows. Reconstruction work in 2002 saw the addition of a platform for bicycles. It is attached to the chassis and offers space for 8 bikes.

 

Technical data

Length

9.66 m (without bicycle platform)

Width

3.93 m (without steps and handgrips)

Height above top of rail

4.08 m (varies due to suspension)

Dead weight

26 t (empty, unloaded)

Payload

7.5 t (100 people at 75 kg each)

Normal weight

33,500 kg

Seats

42

Standing room

58

Freight transporter with closed carriage

Called "Wagon 2", the freight transporter is at the other end of the cable and was originally the most important part of the funicular. It was specially designed to carry freight wagons, but different kinds of passenger vehicles can also be mounted on it, a practice which started as long ago as 1923. This flexibility makes the Oberweissbach funicular unique. Today, the freight transporter can carry either our closed or open-top wagon. These are the platform's usual loads, as it transports a freight wagon only when we give a demonstration.

All of the controls are in the platform itself, which means it can also work without carrying a carriage and simply transport employees. 

The closed carriage has been in use since 1972. A trailer wagon for the electric-powered railcar operating on the Schleiz-Saalburg line, its number is EB 188 513. It was altered for deployment on the funicular line and sliding steps were fitted so that it reached the step-shaped platform at the summit station, where the gap was about one metre. The 2002 reconstruction was intended to return it largely to its original form, but it also entailed installing an emergency escape ladder on one side in line with passenger safety requirements for funicular railways.

Technical data

Length

10.3 m

Width

2.56 m without brake shaft

Height above top of rail when carrying wagon

Up to 9 m (restricted by entrance to summit station's 9.11 m above top of rail)

Freight transporter's unloaded weight

25,000 kg

Freight transportation:
Max. load
Total weight


27,000 kg (1 freight wagon or similar)
52,000 kg  

Passenger transportation with closed carriage:

Empty carriage

Max. load

Total weight

Seats

Standing room



9,200 kg

5,400 kg (72 people weighing 75 kg each)

39,600 kg

32

40

Freight transporter with open-top carriage

Our "convertible" was fashioned from a service car that was once part of a construction works train, and now it functions as the funicular line's open-top carriage. "Wagon 3", as it is known, is designed to be mounted on the freight transporter the same as the closed-top carriage. The fact that Oberweissbach funicular was designed to transport normal railway wagons – the only one in the world to do so – is what makes it possible to use these two carriages for transporting people. The open-top wagon is considerably longer than its closed-top mate, so it projects much further over the edge of the transporter platform. This means that passengers are even higher above the level of the tracks below, giving them an even more impressive view of their surroundings.

It is in use during good weather from May to October. Due to its structure, it does not operate if rain or thunderstorms are forecast.

Technical data

Length

11.27 m

Width of frame

2.38 m

Seats

38

Standing room

65

Payload

8.2 t

Wheelbase

6.8 m

Length over buffers

12.7 m

Freight transporter's unloaded weight

25,000 kg

Passenger transport with the convertible

Empty

Max. load

Normal weight


10,220 kg

7,725 kg (103 people at 75 kg each)

42,945 kg

Seats

38 (without special features)

Standing room

65 (without special features)