Wyssen Cable Crane
The productive, ecological management and care of mountain forests
Set up and function
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 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.
