Alpine Butterfly Loop (Lineman's Loop)

資料來源： http://tw.dictionary.yahoo.com/

語言： <iframe width="640" height="390" src="http://www.youtube.com/embed/gX1dWKg6Ttc" frameborder="0" allowfullscreen></iframe>

Alpine Butterfly Loop (Lineman's Loop) Details

Features: The Alpine Butterfly Loop was described by Ashley as the Lineman's Loop (ABOK # 1053, p 191). It provides a secure loop in the middle of a piece of rope. Load can be safely applied: from the loop to either end of the rope; between the two ends with the loop hanging free; or to the loop with the load spread between the two ends.

Uses: It is useful anytime a secure loop is required in the middle of a rope. A good example is when a line of hikers wish to hook on along the length of a shared rope or as an possible option for the first part of a Trucker's Hitch.

Tying it: There are several methods for tying it. We devised the method which is used in the animation. It is a improvement on other "hand-winding" methods. It helps locate the loop: the second crossing of your hand is near your finger tips and away from the other two turns. This helps you to locate it, pick it up, and wrap it around the other two strands. Setting the knot usually requires holding the loop in your teeth and pulling both ends with your hands.

Advantages: It is more stable than either the Bowline on a Bight or the Figure 8 Loop - both of which may roll over. Even after a heavy load, the Alpine Butterfly Loop remains reasonably easy to undo. In addition, it teaches the technique for tying the Alpine Butterfly Bend. This familiarity is one of the reasons that we prefer the Alpine Butterfly Bend over the other similar bends such as the Zeppelin, the Hunter's, and the Ashley.

…………………………………………………………