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A swing yarder is a mobile piece of heavy duty forestry equipment used for pulling logs from the woods to a logging road with cables. The swing yarder is also known as a grapple yarder. In any logging operation, it is necessary to transport the harvested tree from the stump to a landing for transport to market (usually on a truck). If the ...
A yarder is piece of logging equipment that uses a system of cables to pull or fly logs from the stump to a collection point. [1] It generally consists of an engine, drums, and spar, but has a range of configurations and variations, such as the swing yarder. Clyde Skidder at Marathon Logging Camp near Newton, MS ~1921 Madill 124 Yarder. An ...
Lombard began building 6-cylinder gasoline-powered log haulers in 1914, produced a more powerful "Big 6" later, and built one Fairbanks-Morse Diesel engine hauler in 1934. The internal combustion log haulers (called Lombard tractors) were less powerful than the steam log haulers; and resembled a stake body truck on a skis and tracks chassis.
Harvester head Harvester head, chainsaw visible. A typical harvester head consists of (from bottom to top, with head in vertical position) a chain saw to cut the tree at its base, and cut it to length. The saw is hydraulically powered, rather than using the 2-stroke engine of a portable version. It has a stronger chain and a higher power output ...
The log's kerf movement while cutting can help to indicate binds. Additional equipment (lifts, bars, wedges, and winches) and special cutting techniques can help prevent binds. Binds – This is when the chainsaw is at risk or is stuck in the log compression. A log bound chainsaw is unsafe and must be carefully removed to prevent equipment damage.
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The portable chain saw and other technological developments helped drive more efficient logging, but the proliferation of other building materials in the twentieth century saw the end of the rapidly rising demand of the previous century. In 1950, the United States produced 38 billion board feet of lumber, and that number remained fairly ...
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