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High Lead logging in Western Oregon Cable grue Larix 3T, installed on agricultural tractor. Cable logging, also referred to as skyline logging, is a logging method primarily used on the West Coast of North America with yarder, loaders, and grapple yarders, but also in Europe (Austria, Switzerland, Czech Republic, France, Italy).
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 ...
Dolbeer "Logging Engine" (Patent 256,553) In the simplest logging setup, a "line horse" would carry the cable out to a log where its tree had been downed. The cable would be attached, and, on signal, the donkey's operator (an engineer) would open the regulator, allowing the steam donkey to drag, or "skid", the log towards it.
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 ...
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Timber is commonly grown in hilly country unsuitable for farming and so the ability of a log truck to climb a gradient is significant. The steepness depends on the quality of the surface - mud and snow are harder to climb than gravel and soil. For a manageable gradient, the speed will then depend upon the power of the truck. [7]
Workers milling logs in the steam-powered sawmill, during the Great Oregon Steam-Up of 2006. The signature event at Powerland Heritage Park is the Great Oregon Steam-Up, an event held each year during mid-summer (end of July and beginning of August) when many of the exhibits, normally displayed in a non-operational state, are fired up and shown running.
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