Dornier mobile mast
The mobile mast for terrestrial applications based on telescopically telescoping tubes was a development by Dornier and a diversification / spin-off from space travel . The satellite builders at Dornier developed a patented structure and deployment device for deploying the solar panels after the satellite has reached its orbit in space. Dornier solved this with a number of telescopically nested tubes made of carbon fiber reinforced plastic , which were pulled apart by a spindle and firmly clicked into place. Also the solar panel of the European Columbus modulethe International Space Station ISS was deployed in this way. Dornier used the principle, albeit in aluminum construction, then also for civil and military applications for purposes on earth, and from 1982 offered mobile masts that could be erected quickly as antenna and / or sensor carriers. A 40-meter mast on a truck and a 34-meter version on a trailer were offered. Thanks to an integrated bracing, the mast could be used at any intermediate height and erected or retracted by just two people in 20 minutes. Earth anchors were no longer necessary. Servomotors at the top of the mast took over the alignment of the antennas.
principle
The telescope tubes, which are pushed into one another and stored, are pushed out one after the other by a short spindle in a sequence of kinematic processes of screwing up the first tube and lifting the next tube to the thread of the spindle. The entire mechanics are reduced to a few technically insusceptible and low-wear components. The pipes are also locked mechanically and inevitably by the spindle. Retraction begins with the pipe at the base. The spindle is driven hydraulically. The overlapping of the pipes ensures that they do not tilt and that they can be retracted and extended up to wind speeds of 85 km / h. The guy ropes and the antenna / sensor cables unwind automatically. It is not necessary to climb the mast afterwards. The 40 meter mast system has 11 tubes in the telescope, the 34 meter mast has 8 tubes. The integration with the vehicle was developed and implemented by Doll Fahrzeugbau in Oppenau .
Applications
The Bundeswehr procured 35 of these mobile masts for their Patriot and Hawk systems to set up the mobile directional and data / command radio as a so-called antenna mast system (AMA) / antenna mast group (AMG). With Patriot, up to four launching ramps are connected to one another in terms of telecommunications and commands. After the Hawk system was eliminated, the Hawk masts are now used as a mobile antenna mast system in the Air Force's telecommunications sectors as part of the Air Force's AutoFue system. Telekom procured 11 masts mainly for exploring and testing mast locations for the mobile radio network, using them as temporary gap fillers or for repairs / disconnection of stationary masts. Five of these systems have meanwhile passed into the possession of the THW and serve as emergency masts in disaster control. Dornier has sold more units abroad.
Sources and literature
- Concepts. Technologies. Systems. Brochure. Dornier GmbH, GO12 8906 5000 8, p. 23.