Method of Operation
This describes the use of a steam donkey for logging operations. In the simplest setup, a "line horse" would carry the cable out to a log in the woods. The cable would be attached, and, on signal, the steam donkey's operator (engineer) would open the regulator, allowing the steam donkey to drag or "skid" the log towards it. The log was taken either to a mill or to a "landing" where the log would be transferred for onward shipment by rail, road or river (either loaded onto boats or floated directly in the water). Later a "haulback" drum was added, where a smaller cable could be routed around the "setting" and connected to the end of the heavier "mainline" to replace the line horse.
If a donkey was to be moved, one of its cables was attached to a tree, stump or other strong anchor, and the machine would drag itself overland to the next yarding location.
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