> CABLEWAY CARRIAGE "HORIZONT".
>
> Mountain forests are valuable resources providing wood
> water, wildlife habitat and scenic quality. In order to sustain
> and enhance these scenic, protective and productive values,
> skillful application of forest engineering knowledge is required.
> This is why a cable logging system, rather than a ground based
> one, appears to be quite feasible for the environmentally sound
> transport of wood. Among cableways nowadays, however, semi
> - suspended load systems predominate, and these can, in certain
> natural circumstances, cause severe damage to the soil surface,
> and lead to subsequent water erosion. One end of the log dragging
> along the soil surface can, in these environmentally sensitive
> places, dig a rut, which serves as an open drainage ditch - the
> starting point of water erosion.
>
> For this reason it is necessary to implement a fully
> suspended load system in environmentally sensitive areas (eg., at
> the feet of hills with deep and wet soils, floodplains, moorlands
> etc.). A perpendicularly suspended load is only possible when
> logs are short, spar trees are sufficiently tall and the profile
> of the terrain is sufficiently concave. In all other cases
> a horizontally suspended load is unavoidable, but this means that
> a special cableway carriage is necessary.
> The cableway carriage "HORIZONT", which was designed at the
> Research Station of the School Forest Enterprise Krtiny, 679 05
> KRTINY, Czech Republic, has the following features:
> - maximum load capacity of 1 800 kg
> - length of logs 4 - 14 m
> - lateral extraction up to 25 m on both sides
> - both ends of the lines are mechanically fed out from the
> carriage
> - after extraction of the log and its lifting under the
> carriage the load is automatically fixed - release of the
> load is possible at any point of the skyline route by
> using the auxiliary line (i.e., without a stop)
> - the cableway carriage "HORIZONT" is primarily an option
> for the Czech-made cableway LS 2 - 500, but it can be
> coupled with any other type of cableway carriages which
> have a force-fed out haul line by using the traction of an
> auxiliary line which spools on a drum carried by the
> carriage (e.g.: STEYR KSK 16, TURMFALKE etc.).
>
> Technical description (see the scheme):
>
> The HORIZONT carriage (1) is coupled by the drawbar (2) to
> the original carriage (3) of the cableway LS 2 - 500, or other
> appropriate type - see above. The haul line (4) is coupled by
> splicing with the tag line (5) which is ca 20-30 m long. The haul
> line leads to the original carriage, and the tag line leads to
> the HORIZONT carriage, where it ends in a mushroom-shaped
> terminator (6). The feeding mechanism (10) of the original
> carriage is operated by the traction of the auxiliary line (7).
> This is due to the haul line being fed out from the original
> carriage and simultaneously the tag line being fed out from the
> HORIZONT carriage. In the same way a suspended load is fixed by
> using jaws in the original carriage (8) and in the HORIZONT
> carrriage (9). Releasing of both lines and lowering of the load
> to the deck (or anywhere along the cableway route) is made
> possible by increasing the traction of the auxiliary line (7),
> which releases the grip of the jaws in both carriages.
>
> The HORIZONT carriage coupled with conventional cableways
> makes both a semi - suspended load system and a full - suspended
> load system possible using only one basic machine, and thus
> provides an important compromise between ecology and ecomomics.
>
> More detailed information about the HORIZONT carriage
> can be obtained from this address:
> Mr. P.Horek
> School Forest Enterprise Krtiny
> Research Station
> 679 05 KRTINY
> Czech Republic
> phone: CZ/506/94 101
> Sender: Mr. Vladimir Simanov
> Associate Professor
> Mendel University of Agriculture and Forestry
> Faculty of Forestry and Wood Technology
> Institute of Technology
> Zemedelska 3
> 613 00 Brno
> Czech Republic
phone: CZ/5/4513 4150
fax: CZ/5/5413 4122
> E-mail: SIMANOV@FOREST.VSZBR.CZ or rather
> bartos@forest.vszbr.cz
As a appendix (obr1.bmp - bitmapa format, obr1.pcx - Paintbrush
format) there are two files with the scheme.
ing. Zdenek Bartos
Mendel University of Agriculture and Forestry Brno
Faculty of Forestry and Wood Technology
Department of Timber Logging and Transport
Zemedelska 3, 613 00 Brno, Czech Republic
phone: 0042/5/4513 4155
phone: recorder (zaznamnik) 0042/5/4513 4149
fax: 0042/5/4521 1422
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