| Summary: | Extraction process of wood raw materials, from forest stand
to the nearest forest road, is very difficult and expensive stage having
highest environmental damages. Forestry activities where limited to the use of
technology have great importance in terms of technical, economical, ergonomic
and environmental in mountainous terrain especially. The aim of this study is
to develop an economic and ergonomic system to ensure the transport of logs to
the nearest forest path by cable line and also to provide an alternative
skyline system to existing costly methods in air transportation. In our
country, the only method used to transport of logs in the air is the forest
airlines. Differences of the proposed system from other airlines (expensive and
imported) are more simple, ergonomic and economic. Thus, possible damages in
both logs and environment will be minimized during the transportation and an
ergonomic work will be done. In this system, drummed forest tractor was used
for the power supply and 10-12 mm thickness steel cable as main cable was used.
Locking wagon on the main cable was produced in special mechanic industry and
it was integrated to the system. This wagon has 6-8 mm thicknesses ground cable
and process of pulling the timber up to the forest road by cable wrapped to
drum was completed. Ring system is used in the pulling of logs to uphill
direction. Installation procedures of this system in the field can be performed
in a very short period as a few hours in a simple manner. This research was
tested in Mountainous Eastern Black Sea Region at the field condition formed
conifer forest in the spring 2016. Controlled pulling to upward by using engine
power was taken essential. Based on this study, drawing speed and efficiency on
the motor system were found 1,05 m/s and 3,057 m3/h, respectively. Average skidding distance was 140 meter in
both cases. Previously imported heavy forest airlines are not being profitable
due to high depreciation price and inappropriate for the magnitude work. This
system to be developed will be the first in our country. According to the
forest airlines used in this world, the advantages are as follows: The tower is
not required, practical, cheaper and portable, and it does not need a big drum.
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