Harvester and Forwarder on Steep Slopes - The European ...Harvester and Forwarder on Steep Slopes -...

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Harvester and Forwarder on Steep Slopes - The European Perspective Prof. Dr. Karl Stampfer Institute of Forest Engineering, Department of Forest and Soil Sciences, University of Natural Resources and Life Sciences, Vienna

Transcript of Harvester and Forwarder on Steep Slopes - The European ...Harvester and Forwarder on Steep Slopes -...

Page 1: Harvester and Forwarder on Steep Slopes - The European ...Harvester and Forwarder on Steep Slopes - The European Perspective Prof. Dr. Karl Stampfer Institute of Forest Engineering,

Harvester and Forwarder on Steep Slopes - The European Perspective

Prof. Dr. Karl Stampfer Institute of Forest Engineering, Department of Forest and Soil Sciences, University of Natural Resources and Life Sciences, Vienna

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Roadmap

Why Europeans want to move harvester and forwarder operations to steep terrain?

Results of a pilot study with tension monitoring and productivity analyses

(Unsolved) problems & future challenges

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Mechanized timber harvesting Cost comparison

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Working accidents Chain saw versus harvester

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More reasons for pushing new technologies onto steep slopes

u  Discussions about state of the art „whole tree cable yarding“ technology in steep terrain (nutrient loss, residual stand damage, working accidents).

u  Lack of qualified workforce for harvesting with the chain saw.

u  Considerable thinning requirements in steep terrain.

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Steep terrain harvester

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Harvester and forwarder integrated winch systems

HAAS HIGHGRADE (JOHN DEERE)

KOMATSU SPW

HERZOG ALPINE SYNCHROWINCH (PONSSE)

HSM FORCE-SYNCHRO DRIVE HSW 15

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Anchor machine winch systems

HERZOG SYNCHROWINCH MW500

ECOFORST T-WINCH HAAS UNI WINCH

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Installation time for the traction aid cable

strip roads

forest road

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Cable assist harvester Tension example

uphill

downhill

2 tension ranges

PHD [email protected]

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Cable tension

Slope

Cable assist forwarder Tension & slope

PHD [email protected]

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Cable assist forwarder Tensions during loading

PHD [email protected]

machine driving crane work

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Cable assist harvester Productivity

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….. the machine must remain stable and have traction without cable assist.

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Harvester operating range

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Definition of risk zones

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Outlook

u  Cable assist harvester and forwarder are efficient harvesting systems for steep slopes (thinning and clear cut).

u  Still discussion about the operating limits with this technology. A European standard for cable assist harvester and forwarder on steep slopes is in preparation.

u  We have to adapt and improve the quality of the existing safety guidelines.

u  Tree anchors fail often in small sized thinning stands.

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Thank you for your attention!


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