![]() The constructor is based on the clove hitch, except that it has an extra half-knot that provides an extra hold when the knot is pulled tight. In the days when black powder was used for blasting in mining operations, this was the knot that was tied around the top of the bag containing the black powder to hold the fuse in securely hence, it’s other common name, the Bag Knot. If an item, such as a temporarily whipped rope, is going to be cut very close to where a Constrictor binds it a Boa knot may remain more stable.Once you learn to tie and use the constrictor, you will wonder where it has been hiding in all those knot books and why it isn’t in wider use today. Those recommendations aside, Constrictor knots do function best on fully convex objects. In situations where the object leaves gaps under the knot and there are no corners, it is possible to finish the Constrictor knot off with an additional overhand knot, in the fashion of a Reef knot, to help stabilize it. If binding around a not fully convex, or square-edged, object arrange the knot so the overhand knot portion is stretched across a convex portion, or a corner, with the riding turn squarely on top of it. The Constrictor and Double Constrictor are both extremely secure when tied tightly around convex objects with cord scaled for the task at hand. If care is taken not to cut too deeply, the underlying wraps will protect the bound object from being marred by the knife. The knot will spring apart as soon as the riding turn is cut. If the ends have been trimmed short, or the knot is otherwise hopelessly jammed, it can be easily released by cutting the riding turn with a sharp knife. The use of a pick, marlinespike, or some other tool able to be forced between parts can help. If the ends are still long enough, it may be possible to untie by pulling one end generally parallel to the bound object and a bit up away from it, and prying it into the opposite end's part to open the knot. Releasing Cutting the riding turnĪ heavily tightened Constrictor knot will likely jam. To release, tug on the working end so that the bight passes back through the knot.
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