. Economics and design of a radio-controlled skyline yarding system. Logging, Skyline. Fan-Shaped Unit A fan-shaped unit is generally used when a cutting unit is laid out in a drainage head (fig. 7). A single spar is used at the landing and the skyline roads radiate to tail spars spaced along the outer edge of the unit. Note that each skyline is not in the center of the road or area to be logged, because the weight of the butt- hook and chokers cannot be pulled by hand as far uphill as on the level or downhill. Fan-shaped units in a drainage head may be particularly troublesome in this respect
. Economics and design of a radio-controlled skyline yarding system. Logging, Skyline. Fan-Shaped Unit A fan-shaped unit is generally used when a cutting unit is laid out in a drainage head (fig. 7). A single spar is used at the landing and the skyline roads radiate to tail spars spaced along the outer edge of the unit. Note that each skyline is not in the center of the road or area to be logged, because the weight of the butt- hook and chokers cannot be pulled by hand as far uphill as on the level or downhill. Fan-shaped units in a drainage head may be particularly troublesome in this respect, due to the amount of sloping ground frequently encountered. .—A fan-shaped unit with skyline roads radiating from a Solid lines are skylines and dashed lines indicate area served skyline. Contour lines are also Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Binkley, Virgil Wayne; Pacific Northwest Forest and Range Experiment Station (Portland, Or. ). Portland, Or. : Pacific Northwest Forest and Range Experiment Station, Forest Service, U. S. Dept. of Agriculture
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Keywords: ., bookcentury1900, bookcollectionameri, bookcollectionbiodiversity
