On the Rational Parameters of the Operation of a Full-Rotation Timber Harvesting Machine
DOI:
https://doi.org/10.37482/0536-1036-2026-2-113-123Keywords:
logging machine, felling strip width, travel distance, tree accessibility, area inaccessible to the logging machineAbstract
The technological parameters of the operation of a full-rotation timber harvesting machine have a significant impact on the ecological and operational efficiency of logging operations. The requirement to harvest the entire merchantable stand during clear-cutting implies avoiding areas on the strip that are inaccessible for the manipulator, which arise due to varying distances between work sites. Limiting the felling strip width reduces several technological performance indicators of the timber harvesting machine, specifically decreasing the area harvested per setting and, consequently, the total harvested timber volume. The aim of the study is to determine the optimal combination of felling strip width and travel distance in stands of varying density, considering strip width limitations and acceptable risks of leaving trees uncut. Analytical expressions were derived to calculate areas accessible to the timber harvesting machine manipulator, based on the distance of ancillary travel, the width of the felled strip, and the probability of leaving uncut trees in inaccessible areas, dependent on stand density and ancillary travel distance under various constraints on strip width. Results of calculations regarding technological parameters are presented for an timber harvesting machine with a maximum manipulator reach of 10 m and a minimum of 2 m, operating in stands with densities from 300 to 900 trees/ha. Specific data provided include the working zone area under strip width constraints, the area harvested per working position, and the necessary ancillary travel distances for various stand densities, given a set probability of leaving trees uncut. Based on the results of the conducted studies, it has been established that the considered options for combining the width of the felling strip and the maximum distances between work sites, with given risks of leaving uncut trees in stands of varying density, under equal conditions, ensure working area sizes that differ by no more than 3 %.
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