Avalanche tower LS12-5

For inaccessible, remote large-area avalanche starting zones. Protection of traffic lines and important ski runs.

Avalanche tower; in the background the Matterhorn, Zermatt
Avalanche tower with dropped charge just before detonation
Wyssen avalanche tower magazine ready for take-off

Construction and function

  • The tower is permanently installed in the avalanche starting zone.
  • A magazine with 12 explosive charges of up to 5 kg is set up on the tower.
  • The operation is carried out with software on a PC.
  • Coded radio signals are sent to the controls in the magazine
    to trigger off the process.
  • A charge is then dropped by means of a triggering mechanism and remains hanging on its retaining line over the snow.
  • During the drop, the charge's dual ignition is pyrotechnically activated.
  • The detonation takes place after a time delay.
  • The blasting height over the snow can be varied by the length of the retaining line.

  Advantages

  • Blasting above the snow with larger charges creates the maximum effective range (up to 260 m in diameter)
  • The magazine is brought back to the station by helicopter for reloading, servicing and storage during the summer
  • The pilot can put the magazine on the tower or lift it off using the special helicopter catch and the insertion aid on the magazine without needing a flight assistant.
  • Weather independent and rapid release.
  • No personnel in the avalanche danger zone.
  • The explosive creates a high-frequency N-shaped pressure wave for the optimum effect.
  • Comparatively low installation expenditure and low impact on nature.
  • Compact and tightly sealed magazine: all critical and moving parts are well protected; the opening for the charge drop is very small and is automatically de-iced.
  • No vulnerable feed lines are necessary; energy is supplied by solar cells on the magazine.
  • Safe and simple preparation of the charges is possible in the building.
  • No uncontrolled sliding of the ignited charges is possible.
  • System integration possible with snow measuring stations for decision-making assistance.