The productive, ecological management and care of mountain forests

Mountain forests can be thinned out in a profitable and careful manner using a Wyssen cable crane. The forest slopes can be divided into cultivation strips of about 100 m wide and up to 3,000 m long. Only a simple mainline and skyline is necessary for the cable crane. In the same process tree trunks can be dragged the whole length of the cultivation strip to the cable crane, lifted onto the skyline, transported towards the valley or up the mountainside and set down on the road. When pulled tight sideways the mainline rises. The load is lifted at the front, and easily passes over stamps and other obstacles and can be drawn from both sides. The Wyssen skyline crane thus provides the benefit of optimally preserving both the forest and the forest floor.


The carriage can be clamped onto the skyline after it has stopped, either by radio signal or automatically, depending on the model. When the mainline is now unwound by the sled cable winch, the hoisting hook is lowered from the carriage. It is then pulled to the load and fixed with the cable sling. When the load has been lifted and the hoisting hook is clipped into the carriage, the carriage is unclamped from the skyline, so that the load can be transported on the skyline towards the valley or up the mountainside respectively. The skyline and the sled cable winch are sually anchored onto trees. The sled cable winch can be positioned at the upper end of the cable crane either with a helicopter or on its own. The sled cable winch serves as a construction tool and as a drive unit for the cable crane. The mainline on the cable drum pulls the carriage either empty or loaded uphill. Downhill the load is slowed down with the air brake. A double-block brake with a very large braking surface, built into the cable drum serves as a second safety and holding brake.

Das Tragseil und die Seilwinde werden meistens an Bäumen verankert. Die Seilwinde kann per Helikopter oder aus eigener
Kraft an das obere Ende des Seilkranes gebracht werden.

Die Seilwinde dient als Montagewerkzeug und zum Antrieb des Seilkranes. Das Zugseil auf der Seiltrommel zieht den Laufwagen leer oder mit Last bergauf. Bergab wird die Last mit der Luftbremse gebremst. Als zweite Sicherheits- und Haltebremse ist eine Zweibacken-Bremse mit sehr grosser Bremsfläche in der Seiltrommel eingebaut.


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