Tumble hitch: Difference between revisions
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The version of the named knot (my invention, btw) presented here has a significant risk (of non-/difficult-release) with it. |
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{{Infobox knot |
{{Infobox knot |
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| name = Tumble hitch |
| name = Tumble hitch |
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| names = a better [[Highwayman's hitch]], Bank Robbers Knot, Getaway hitch |
| names = a better [[Highwayman's hitch]], Bank Robbers Knot, Getaway hitch, Quick-release knot |
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| image = |
| image = Tumble Hitch for Quick Release.png |
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| caption = Very clean release and very little distortion of the main load bearing |
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| caption = |
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| type = hitch |
| type = hitch |
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| type2 = |
| type2 = |
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The '''tumble hitch''' is a "slip-free", quick-release |
The '''tumble hitch''' is a "slip-free", quick-release hitch [[knot]] used for temporarily securing a [[rope]] such that it can be released easily to be completely free of the hitched-to object (instead of parts still being wrapped around it). The hitch might be able to be released with a tug of the working end, even when under tension; but the workings depend upon materials and forces; note that in some cases, "under tension" will amount to simply being tied and the line itself giving significant tension by weight. The tumble hitch is tied in the bight. |
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Usually two locking turns (as in the picture here) suffice for a knot secure enough for most purposes, but another could be added for further stability. The general knotting principles evident in this and the well-published "highwayman's hitch" can be implemented in a variety of ways. This knot was designed specifically to avoid the problem of the highwayman's hitch of putting the full force of loading upon the locking toggle ("slip") bight, which esp. in soft cordage can collapse that and pull it through the bight "frame" it had locked against! |
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NB: The version shown in this page as of 2019-01-28 is NOT the version presented on the Notable Knots site. The key difference is that here, one is (wrongly) instructed to "Cross a bight near the working part over the standing part" instead of simply putting a bight UNcrossed over the first-positioned bight. The importance is that the turn shown here will often constrict and nip the enclosed bight --as e.g. done in a sheepshank & bell-ringer's loop--, defeating (full) release; someone who just rappelled in canyoneering, which sometimes such knots are used, would be frustrated in trying to pull the knot free. Also, this mistaken presentation I'm redressing says that the working end is near the hitch; this might well NOT be the case! And the images unfortunately show a quite short tail/working-end dangling >>on the wrong side of the object (which would prevent "slipping free" from it)<< ! |
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The design goal for this knot was to redress the vulnerability of the well-known "highwayman's hitch" to capsize the slip bight; this known know put full load upon this bight which toggled the knot, and especially in flexible cordage it could fold this toggling part and capsize, possibly spill the knot. The initial, simple revision was to change the positions of the placed bights of the highwayman's hitch so that the 2nd-placed bight would go INSIDE the initial one (which was in the to-be-heavily loaded standing part), and then the "slip bight" would go through this 2nd bight and so be only indirectly pressured by the loading --making for both a more stable knot and one more easily released. The Notable Knots side, as well as Grog's Animated Knots, give a further version wherein the slip bight is take not directly up through but rather around the standing part then to be tucked in the opposite direction through that 2nd-formed bight; doing so will see this slip bight pressed into the object, offering perhaps some surer stability (but at a cost of incurring more friction when pulling to release it --back around the object). |
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Assuming hitching to a high horizontal beam: |
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# A bight is placed over the beam with both the standing part and the working end hanging down. |
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# A second bight of the working end is passed behind the beam, and up through the first bight. |
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# A third bight of the working end is passed in front of the standing part, then back and up through the second bight. This third bight should be sufficiently long, since pulling the standing end from various directions may pull some of it through the knot. |
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# Optionally the previous step can be repeated for increased security, especially if tied around bigger objects. The resulting knot has been called ''Somersault Hitch''.<ref>{{youtube|EJ5WuUYYgtI|Somersault Hitch}}</ref> |
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The standing part just hangs from the first and only bight in front of the beam. All other bights are behind the beam and through the previous bight. |
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essentially the [[Highwayman's hitch]]) |
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* Crossing over the standing part, then wrapping around the post/pole/beam as in the pictures (better hold) |
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* Wrapping the standing part half a turn, then wrapping around the post/pole/beam (even better hold) |
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* wrapping the standing part a full turn, then wrapping around the post/pole/beam (even better hold than the previous one) |
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* etc.. |
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Untying is done by pulling the working end until all bights are released from inside the previous bight and the rope leaves the beam. |
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| ⚫ | The Notable Knot Index recommends the tumble hitch as a more stable hitch than the [[highwayman's hitch]] |
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Tying sequence for one variant of the tumble hitch [these & associated images need correcting]: |
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<gallery> |
<gallery> |
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File: |
File:TumbleHitch-step1.jpg|a first bight over the beam. |
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File: |
File:TumbleHitch-step2.jpg|bight of working end up behind and up through the bight. |
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File: |
File:TumbleHitch-step3.jpg|then around the standing part and up through the last bight. |
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File:TumbleHitch-step4-forExtraStrength.jpg|repeat step 3 for more stability. |
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File:GüvenliceEskiyaBagi4.JPG|Tighten by pulling standing part and last bight |
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</gallery> |
</gallery> |
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Latest revision as of 05:56, 4 June 2024
| Tumble hitch | |
|---|---|
 Very clean release and very little distortion of the main load bearing | |
| Names | Tumble hitch, a better Highwayman's hitch, Bank Robbers Knot, Getaway hitch, Quick-release knot |
| Category | Hitch |
| Related | Highwayman's hitch, Mooring hitch |
| Releasing | Non-jamming |
| Typical use | Quick-release, draw loop hitch |
| Caveat | potentially unstable |
The tumble hitch is a "slip-free", quick-release hitch knot used for temporarily securing a rope such that it can be released easily to be completely free of the hitched-to object (instead of parts still being wrapped around it). The hitch might be able to be released with a tug of the working end, even when under tension; but the workings depend upon materials and forces; note that in some cases, "under tension" will amount to simply being tied and the line itself giving significant tension by weight. The tumble hitch is tied in the bight.
Usually two locking turns (as in the picture here) suffice for a knot secure enough for most purposes, but another could be added for further stability. The general knotting principles evident in this and the well-published "highwayman's hitch" can be implemented in a variety of ways. This knot was designed specifically to avoid the problem of the highwayman's hitch of putting the full force of loading upon the locking toggle ("slip") bight, which esp. in soft cordage can collapse that and pull it through the bight "frame" it had locked against! Hence, The Notable Knot Index recommends the tumble hitch as a more stable hitch than the highwayman's hitch.[1]
Tying[edit]
Assuming hitching to a high horizontal beam:
- A bight is placed over the beam with both the standing part and the working end hanging down.
- A second bight of the working end is passed behind the beam, and up through the first bight.
- A third bight of the working end is passed in front of the standing part, then back and up through the second bight. This third bight should be sufficiently long, since pulling the standing end from various directions may pull some of it through the knot.
- Optionally the previous step can be repeated for increased security, especially if tied around bigger objects. The resulting knot has been called Somersault Hitch.[2]
The standing part just hangs from the first and only bight in front of the beam. All other bights are behind the beam and through the previous bight.
Untying is done by pulling the working end until all bights are released from inside the previous bight and the rope leaves the beam.
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a first bight over the beam.
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bight of working end up behind and up through the bight.
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then around the standing part and up through the last bight.
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repeat step 3 for more stability.
See also[edit]
References[edit]
- ^ "The Tumble Hitch". Notable Knot Index. Retrieved 2012-02-25.
- ^ Somersault Hitch on YouTube
External links[edit]
