. Economics and design of a radio-controlled skyline yarding system. Logging, Skyline. "DEADMAN" suitable stumps are not available, a "deadman" may be used as a tail-hold anchor. Various methods for constructing deadmen can be used; how- ever, a buried log is the most practical (fig. 26). Figure 26.—Cross-section view of a "deadman" ALINEMENT OF supports must be alined between the head and tail spars (fig. 27). Lateral deflection in the skyline, caused by the support jacks being out of aline- ment, increases wear on the sk
. Economics and design of a radio-controlled skyline yarding system. Logging, Skyline. "DEADMAN" suitable stumps are not available, a "deadman" may be used as a tail-hold anchor. Various methods for constructing deadmen can be used; how- ever, a buried log is the most practical (fig. 26). Figure 26.—Cross-section view of a "deadman" ALINEMENT OF supports must be alined between the head and tail spars (fig. 27). Lateral deflection in the skyline, caused by the support jacks being out of aline- ment, increases wear on the skyline and reduces the speed of the carriage passing an interme- diate support. If a skyline jack is severely out of alinement, it could cause derailment of the carriage or damage the safety device which keeps the carriage on the skyline. Figure 27.—Aerial perspective of a misalined multispan skyline. 15. 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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