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... Timber jack C-450 HSM-904. 450C / / Jourgholami, 2005. Timberjack450C / Timberjack 450C () / (Najafi et al,. 2007). HSM 904. (Parsakho et al., 2009). HSM 904 Timberjack 450C. -...(Sobhani & Naijnoori, 2006)..(Naghdi, 2004). Eghtesadi, ) (Sobhani & Ghasemzade, 1990) ).(1991 ( Feghhi, ) (Naghdi et al., 2005).(1990. / / (Abeli,1996) Sokoine. ( Ledoux & Huyler, 2001)
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... Timber jack C-450 HSM-904 timberjack hsm 140000 120000 100000 80000 60000 40000 20000 0 50 150 250 350 450 550 650 750 فاصله چوبكشي (متر) هزينه واحد توليد (به ريال) - هزينه واحد توليد ) ريال) 600000 500000 400000 300000 200000 100000 0 hsm904 timberjack 450C 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5 5.5 6 6.5 7 حجم بار (متر مكعب) -... Timberjack450C ). HSM904 (
HSM904, / - / / Timberjack450C, / // () () (%) (%) ) (.. Timberjack450C
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- Abeli, W. S. 1996.Comparing productivity and Costs of three sub grading machines, Journal of forest engineering. 51:33-39. - Egan, A. and J. Baumgras. 2003. A statewide study of ground skidding and harvested stand attributes in Appalachian hardwood stands. Forest Products Journal. 53(9):59-63. - Eghtesadi, A. (1991).Study Method of Wood Extraction from Forest to Factory Yard in Nekah Forest. MSc.thesis, College of Natural Resources, University of Tehran, Iran, 144 pp - Feghi, J. (1990). Evaluation of two Harvesting Mechanization Systems. MSc thesis, University of Tehran, Iran - IUFRO. 1995. Forest work study.nomenclature.test Edition valid 1995-2000.International Union of Forestry Research Organisations WP 3.04.02.Swedish University of Agricultural Sciences, Department of Operational Efficiency, Garpenberg, 16 pp - Jour Gholami, M. (2005) Study of efficiency, production and cost of large and small skidders (Case study of TAF and Optimum road spacing of ground based 112 skidding operations Timberjack 450 C). MSc Thesis, Faculty of Natural Resources, Tehran University - Javadpoor, J. 2006. Study of wood extraction system in two planned and unplanned landing conditions (Asalem northern Iran). MSc Thesis, Faculty of Natural Resources, Guilan University - Ledoux,C.B. and Huyler,N.K. 2001. Comparison of two cut-to-length harvesting systems operating in eastern harvdwoods. Journal of forest engineering. 12(1):53-59. - Naghdi, R. (2004).Comparative study of tree length and cut to length logging method. PhD thesis, College of Natural Resources, University of Tehran, Iran, 320p - Naghdi, R. N.Rafatnia, H.Sobhani, G.H.Jalali, and S.M. Hosseini, (2005). A Survey of the Efficiency of Timber Jack 450C Wheeled Skidder in Sheared Forests. Journal of Natural Resources, University of Tehran, Iran, 57(4)657-687. - Najafi, A. Sobhani, H. Seed, A. Makhdom, M. Marvi mohajer, M.R. ( 2007 ). Time study of Skidder HSM 904. Journal of the Iranian Natural Resources. Vol. 60, No. 3, 2007, pp. 921-930 - Parsakhoo, A. Hosseini, S A Lotfalian M Jalilvand, H.2009.Efficiency and Cost Analysis of Forestry Machinery Usage in Hyrcanian Forests of Iran. World Applied Sciences Journal 6 (2): 227-233 - Sobhani, H. and Rafatnia, N. 1997. Forest harvest planning instruction. Forest, range and watershed organization of Iran. Paper no 166. 16pp. - Sobhani, H. and Ghasemzadeh, R. 1990.The Study of Effects of Skidding by Wheeled Skidder. Journal of Natural Resources. (41):53-64. - Wang, Jingxin; Long, Charlie; McNeel, Joe; Baumgras, John. 2004. Productivity and cost of manual felling and cable skidding in central Appalachian hardwood forests. Forest products journal 54(12) : 45-51 - Zobeiry, M., 2000. Forest Inventory (Measurement of Tree and Stand). 1st Edn., Tehran University Publisher, Iran, ISBN: 964-03-4524-5
Journal of Forest and Wood Products (JFWP), Iranian Journal of Natural Resources, Vol. 63, No. 1, 2010. pp.91-102 102 Evaluation of Production and Cost of HSM-904 Skidder and Timber Jack C-405 in Forests of Wood and Paper Industries of Mazandaran R. Naghdi *1, A. H. Firouzan 2, M. Nikooy 1 and K. Barari 3 1 Assistant Professor, Faculty of Natural Resources, University of Guilan, Somehsara, I. R. Iran 2 Assistant Professor, Islamic Azad University of Lahijan, Lahijan, I. R. Iran 3 MSc. Graduate, Islamic Azad University of Lahijan, Lahijan, I. R. Iran (Received: 12 May 2009, Accepted: 05 May 2010) Abstracts In this research, hourly production and wood extraction costs of HSM-904 and Timber jack C-405 wheeled skidders were evaluated. This research was carried out in compartments 6 and 8 of Sorkh Kolah district in Wood and Paper Industries Forest of Mazandaran. Skidding factors (costs and production) were evaluated using work study and time study techniques. A mathematical model of skidding time was determined for each skidder. The effective factors of the mathematical model for Timber jack skidder was volume per turn, skidding distance and winching length and for HSM-904 skidder was volume per turn and skidding distance. Hourly system production was calculated using time study based on IUFRO guideline. Hourly cost was calculated using guideline from Forest, Rangeland and Watershed Management Organization of Iran. The results showed that the net production (without delay time) was 11.3 and 8.7 cubic meters per hour for Timber jack and HSM-904 skidders, respectively. Skidding costs (with delay time) were 60442 and 88400 Rials per cubic meters for Timber jack and HSM-904, respectively. Keywords: Timber jack skidder, HSM-904, Hourly production, Skidding cost, Time study *Corresponding author: Tel: +98 182 3220895, Fax: +98 182 3223600, E-mail: rnaghdi@guilan.ac.ir