. Economics and design of a radio-controlled skyline yarding system. Logging, Skyline. Single-span skyline rigged with tail-hold anchors. OPERATING LINE ROLLERS.—Line rollers may be placed under the skyline on terrain that would be abrasive to tne snubbing line. The roller is a sheave mounted in a steel frame which holds the line clear of the ground fig. 22). GUIDE. Figure 22 Operating line roller placed to reduce abrasion of the snubbing line. SKYLINE JACKS—The skyline jack is a J- shaped device, suspended from an intermediate support spar or cross support skyline, and allows an open-sided ca
. Economics and design of a radio-controlled skyline yarding system. Logging, Skyline. Single-span skyline rigged with tail-hold anchors. OPERATING LINE ROLLERS.—Line rollers may be placed under the skyline on terrain that would be abrasive to tne snubbing line. The roller is a sheave mounted in a steel frame which holds the line clear of the ground fig. 22). GUIDE. Figure 22 Operating line roller placed to reduce abrasion of the snubbing line. SKYLINE JACKS—The skyline jack is a J- shaped device, suspended from an intermediate support spar or cross support skyline, and allows an open-sided carriage to travel along the sky- line Tig. 23).. 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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