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  • Evaluation of different modes for yarding windthrown timber with a double-hitch carriage [Elektronski vir]
    Spinelli, Raffaele, gozdar ...
    Yarding whole trees is the most efficient way of extracting timber in steep terrain and allows reaping the combined benefits of mechanization and biomass recovery. In downhill yarding, however, ... whole-tree extraction is associated with a greater risk of loosening rocks or debris by the incoming loads as they bounce around along the extraction corridor. That may also cause damage to the cables and anchors by corresponding shock loads, ultimately endangering the yarder and its crew. To avoid these risks, »double-hitch carriages« can be employed. They combine a conventional motorized dropline carriage with a secondary carriage (»trailer«), equipped with a further, independent dropline winch. Thus, loads can be attached at two points and transported fully suspended above the ground in a horizontal position. Operation of these carriages may not be limited to the »horizontal« mode: the main carriage could also be operated without trailer (»single« mode), or separate loads may be attached to the two droplines (»double« mode), but their impact on the efficiency and economy of yarding operations is yet unknown. Therefore, the present study investigated how these modes affect the productivity and cost of downhill whole tree yarding. To this end, a classic time and motion study was conducted during a salvage logging operation in Northern Italy under a strictly controlled experimental design.
    Source: Croatian journal of forest engineering. - ISSN 1848-9672 (Vol. 44, iss. 2, 2023, str. 245-257)
    Type of material - e-article
    Publish date - 2023
    Language - english
    COBISS.SI-ID - 154775555

    Link(s):

    https://doi.org/10.5552/crojfe.2023.2051
    https://crojfe.com/archive/upcoming-issue/evaluation-of-different-modes-for-yarding-windthrown-timber-with-a-double-hitch-carriage/
    Repository of the University of Ljubljana – RUL
    DOI

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