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Hitch — object-dependent

Halyard Hitch

Friction on hardware · Physical hitch theory

DiagramsHow to tie it

Does not pick a knot

This page does not pick a knot for you. DNA, molecules, quantum braids and vortices stay off Decide.

Halyard Hitch, finishedHalyard Hitch, finished

Finished structure

Drawn from a rope model of this knot: which strand passes over which comes from where the rope actually lies.

Failure modes

When this family fails, it fails as these. The recovered end still outranks the name.

Jam-to-hardware family

A hitch that cinches to the ring or shackle and is not meant to break by hand.

  • !Second turn tied outside — two half hitches, not a jam
  • !Expected to untie after a snatch
  • !HMPE without a splice — the hitch strips the cover
Fails when
  • !It is tied around a large pole or ring, where the gap between the object and the turns is too big for the turns to grip
  • !The tail is trimmed short and the hitch carries a critical load, a use Animated Knots advises against
  • !It has been heavily loaded and then has to come off, when Animated Knots says it is hard to release
Geometry

  • Only one turn

    Hitch walks on the shackle

    Two turns plus the return tuck are the hitch · step 02

  • Tail tucked away from the shackle

    Unfinished — will walk or jam in the wrong place

    The tail must return through the turns toward the pin · step 03

  • Expected to undo after a hoist

    Knife job on a halyard you needed to break

    The jam is the hitch — pick round turn and two half hitches for a release · step 04

If you saw this

  • Hitch walks on the shackle, or will not break after load

    Check

    • ?Tail through the turns toward the shackle
    • ?Compact against the pin

    Then

    • →Retie the tuck
    • →Use round turn and two half hitches if you must release

  • Only one turn

    Check

    • ?Hitch walks on the shackle
    • ?Inspect step 02

    Then

    • →Retie. Do not dress a defective structure and call it seated.

  • Tail tucked away from the shackle

    Check

    • ?Unfinished — will walk or jam in the wrong place
    • ?Inspect step 03

    Then

    • →Retie. Do not dress a defective structure and call it seated.

  • Expected to undo after a hoist

    Check

    • ?Knife job on a halyard you needed to break
    • ?Inspect step 04

    Then

    • →Retie. Do not dress a defective structure and call it seated.
Same family

Same failure class, different geometry. Open the plates — Diagnose still starts from the symptom.

This failed — start Diagnose

What holds it

  • ·A hitch is object-dependent. Remove the spar, cleat, ring or pile and the structure is usually the unknot.
  • ·Bayman / Maddocks–Keller describe a no-slip regime from wrap count and friction. The prediction is approximate, and only for hitches.

What topology does not predict

  • ·Closed-loop knot invariants (Jones, Alexander) do not say whether a clove hitch will walk on a smooth spar.
  • ·No manufacturer working load is implied by wrap count.
  • ·Wet, iced, or HMPE covers change friction — topology is silent.

Not for

  • ·Joining two free rope ends — that is a bend
  • ·A standing loop that must survive after the object is gone
  • ·A hitch you must break by hand after a snatch
  • ·A ring that needs a round turn first (anchor bend)

Same pattern, different job

No sourced twin among these knots. Related knots stay on the Library card.

Sources