EFFICIENCY ASSESSMENT OF HSM904 GRAPPLED SKIDDER ON DIFFERENT LEVELS OF SKID-TRAIL SLOPE

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ABBASI M.; EZZATI S.; GHAJAR E.; NAJAFI A.

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Journal: Journal of Wood and Forest Science and Technology Year:2016 | Volume:22 | Issue:4 Page(s): 205-221

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Title

EFFICIENCY ASSESSMENT OF HSM904 GRAPPLED SKIDDER ON DIFFERENT LEVELS OF SKID-TRAIL SLOPE

Author(s)

ABBASI M. | EZZATI S. | GHAJAR E. | NAJAFI A. | Issue Writer Certificate

Keywords

ARZAFUN DISTRICTQ2

CUT-TO-LENGTH SYSTEMQ2

CONTINUES TIME STUDYQ2

GROUND-BASED SKIDDINGQ2

SKIDDING DIRECTIONQ2

Abstract

Background and objectives: Efficiency study of skidding equipment may bring a good potential to recognize net production level of machines and their operational costs per time unit, and also be a beacon for better allocating of skidding systems in different terrain conditions over forested ecosystem. In the present study, the efficiency of HSM904 grappled skidder is studied in a cut-to-length harvesting system at district #2 (Arzafun) belonging to Mazandaran wood and paper company forests.Material and methods: We pre-delineated six slope treatments range from 10 to 28% with 3% interval on a skid-trail by 700-m in length, which was running contrary to the slope (uphill skidding). Volume and number of log in each turn were divided into two classes < 3.5 and > 3.5 m3, and up to 2 and more than 2 logs, respectively.Results: the results of CONTINUES TIME STUDY on basis of 156 registered turn showed that slope class (13-16%) had been significantly effects on skidder speed efficiency in unloading condition, while the least of ones was recorded for slope class (22- 25%). Parallel to this, the results of general linear model test shows that the effect of slope and volume of load were significant on skidder speed efficiency, while the number neither of log was not significantly effect on machine efficiency at the loading condition. The maximum and minimum speed of skidder were recorded for slope class (10-13%) with up to 3.5 m3 volume of log and slope class (19-28%) with more than 3.5 m3 volume of log per a turn, respectively.Conclusion: This study suggested that using the HSM904 grappled skidder may be economically justifiable on skid-trail slope of 25-28% due to decrease in the total time of skidding, skidding distance and it's less economically issues.

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APA: Copy

ABBASI, M., EZZATI, S., GHAJAR, E., & NAJAFI, A.. (2016). EFFICIENCY ASSESSMENT OF HSM904 GRAPPLED SKIDDER ON DIFFERENT LEVELS OF SKID-TRAIL SLOPE. JOURNAL OF WOOD AND FOREST SCIENCE AND TECHNOLOGY, 22(4), 205-221. SID. https://sid.ir/paper/156924/en

Vancouver: Copy

ABBASI M., EZZATI S., GHAJAR E., NAJAFI A.. EFFICIENCY ASSESSMENT OF HSM904 GRAPPLED SKIDDER ON DIFFERENT LEVELS OF SKID-TRAIL SLOPE. JOURNAL OF WOOD AND FOREST SCIENCE AND TECHNOLOGY[Internet]. 2016;22(4):205-221. Available from: https://sid.ir/paper/156924/en

IEEE: Copy

M. ABBASI, S. EZZATI, E. GHAJAR, and A. NAJAFI, “EFFICIENCY ASSESSMENT OF HSM904 GRAPPLED SKIDDER ON DIFFERENT LEVELS OF SKID-TRAIL SLOPE,” JOURNAL OF WOOD AND FOREST SCIENCE AND TECHNOLOGY, vol. 22, no. 4, pp. 205–221, 2016, [Online]. Available: https://sid.ir/paper/156924/en

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