DIGITALNA ARHIVA ŠUMARSKOG LISTA
prilagođeno pretraživanje po punom tekstu



ŠUMARSKI LIST 11-12/2004 str. 84     <-- 84 -->        PDF

Ž. Zečić, A.P.B. Krpan, B. Stankić: PRIVLAČENJE. OBLOVINE TRAKTOROM TIMBERJACK 240 C Šumarski list br. 11-12, CXXVII1 (2004). 671-678


Abstracts "Emerging harvesting issues in techlopments
on work studies in forestry" IUFROnology
transition at the end of century" IUFRO WP 2.04.02 Work study, payment and labor
Division 3, RGs: 3.04.00 Operational planning productivity, Vassilika - Thessaloniki, Greece
and control; work study, 3.06.00 Forest opera22
- 24 June 1988, Department of forest enginetions
under mountainous conditions, 3.07.00 Erering
of Forest research institute of Tessaloniki,
gonomics, Opatija 27. 9.-1 . 10. 1999, Faculty 293-298.
of Forestry of Zagreb University, 119-120.


Skaar, R., J. Rickards,S. Haberle,K. Apel, R.


Mikleš, M, J. Suchomel, 1999: Relationship Bjorheden, 1988: A proposal of an Internabetween
terrain conditions and operating conditional
Forestry Time Study Nomenclature. Protion
of forest skidders. Proceedings of IUFRO ceedings "Developments on work studies in fosymposium
"Emerging harvesting issues in restry" IUFRO-WP 2.04.02 Work study, paytechnology
transition" Opatija. 33-35. ment and labor productivity, Vassilika - Thessa


loniki, Greece 22 - 24 June 1988, Department of


REFA, 1984: Methodenlehre des arbeitsstudiums. Teil


forest engineering of Forest research institute of


1 Grundlagcn, 7. iiberarb. Aufl. C. Hanser Miin-


Tessaloniki, 355-361.


chen. 1-107.
Schlaghamersky,A., 1994: Zeitstudien. Fachhoc-Zečić , Z.,1998: Skupni rad pri proredama u sastojinama
Požeškog gorja s posebnim osvrtom na


schulc Hildesheim/Holzminden, Fachbereich


privlačenje drva traktorima. Magistarski rad.


Forstwirtschaft in Gottingen, 1-146.


Šumarski fakultet Zagreb, 1-161.


Skaar, R., 1988: A proposal on an international forest
work study terminology. Proceedings "Deve


SUMMARY: This paper deals with the research of the skidder Timberjack
240 C in timber skidding in regeneration fellings at working sites in hilly conditions.
The achieved effective time in final felling is 81.44 % of total time
consumption. The average loads per cycle range between 4.24 m3 in final
felling. The achieved daily output is on the average 64.11 m3/day.


The average travel speeds of unloaded tractors are 4.96 km/h and of the
loaded ones 3.55 km/h. The travel speed is mostly affected by longitudinal
slopes of strip roads and by the type of skidding considering the slope gradient.
The average speeds of pulling the choker are 1.33 km/h and of load
winching 1.03 km/h respectively.


Total cycle time scheduled for the tractor at the site, considering the
skidding distance, ranges between 20.25 min and 35.26 min. Fora distance of
300 + 100 m total cycle time is 27.76 min at the worksite. Time standard at the
site A ranges between 4.77 min/m3 and 8.31 min/m3. At a distance of
300 + 100 m, the time standard is 5.95 min/m3 respectively. Daily output at
the site ranges between 100.54 m3/day and 57.75 m3/day. For a distance of
300 + 100 m a higher output is achieved at the site and it amounts to


80.63 m3/day. In the final felling for a winching distance of 100 m to 700 m at
the site, the costs range between 18.61 HRK/m3 and 32.41 HRK /m3. For the
winching distance of 300 +100 meter, the costs amount to 23.21 HRK/m3 for
the site. Research results confirm the skidders work area, as the highest
efficiency and the lowest cost are achieved in final felling.