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Filtering by: Contributor advisor sim Aulerich, D. Edward

A study of the coefficient of drag resistance in yarding logs

Creator:

Henshaw, John Robinson

Abstract:

This study was conducted to examine the coefficient of drag resistance (µ) between a log and bare forest soil during partial suspension yarding. Drag resistance in this study was defined as the resistance due to friction between the soil and the log plus the resistance due to the plowing action...

Resource Type:

Masters Thesis
Prebunching with a low investment skyline yarder in thinnings

Creator:

Keller, Robert Richard

Abstract:

This study compares the production rates and yarding costs of prebunching with a low investment skyline yarder and swinging with a larger skyline yarder to full-cycle thinning with the larger yarder The study analyzes two slackpulling techniques (manual and haulback assisted) and two carriages (a multi-span carriage and a clamping...

Resource Type:

Masters Thesis