THE RESEARCH OF FORWARDER PASSING IN HAUL

Abstract

skidding, the number of drives and the amount of logging waste in the hauls are presented. The research was performed in regional unit of Dubrava. The research analyses the skidding and rut depth values of wheeled and semi-tracked chassis in three different ways: without branches; with 25 erdm branches laid in hauls and with 50 erdm branches laid in hauls.

During the research it was found out that the differences in skidding values between wheeled and semi-tracked chassis are in the minimal range of 0,4 - 4 %. The highest skidding with half-tracked chassis was 22,2 %, with wheeled chassis was 18,2 % after 27drives without branches. The lowest result of skidding with semi-tracked chassis was 5,4 %, with wheels - 5 % using 50 erdm of branches in the hauls. After 27 drives without layer of branches the maximum rut depth was 342 mm with the semi-tracked chassis, 319 mm - with wheeled one. The minimum result of the rut depth after 27 drives was 49 mm with semi-tracked chassis and 167 mm with a wheeled chassis using 50 erdm branches in the hauls.