PR Bobbin Knot

Braid wrapped onto a heavier leader, then locked so the join cannot hinge.

• !Hinge at the material transition — the join clicks, then parts
• !Wraps not packed on the heavier line before the lock
• !Lock or tag on the wrong side of the braid, so the column unzips

• !The tight wraps have gaps or slack, so the stack slides along the leader when braid and leader are pulled apart
• !The leader turned with the bobbin while wrapping, so few real turns were laid to grip it
• !The half hitches are loose, missing or tied away from the stack, so the wraps unwind from the braid tag end
• !The flame scorched the braid wraps or the leader beside the melted bump

• Wrap stack slides on the leader

  The connection lets go progressively under a sustained run

  Grip is the product of wrap tension and wrapped length. Slack bobbin drag gives neither. · step 03

• No half hitches over the wrap stack

  The stack unwinds from the end once load cycles

  The hitches are what stop the last wrap from backing off. · step 04

• Leader spun with the bobbin, few real wraps laid

  Looks wrapped, grips almost nothing

  If the leader turns with the bobbin, no relative wrap is accumulating. · step 02

• Wrapped section too long for the guide train

  Knocks through the guides and costs casting distance

  Guide passage is set by the length and taper of the wrapped section. · step 03

• The wrap stack slides along the leader when you pull it

  Check

  • ?Pull the braid and leader apart and watch whether the stack moves at all

  Then

  • →Retie with more bobbin drag
  • →Extend the tight return wraps to a full two to three inches

• The wraps end without half hitches over them

  Check

  • ?Look for the locking hitches sitting on top of the wrap stack

  Then

  • →Add the half hitches and the three-wrap finish; the stack unwinds without them

• The connection knocks or catches going through the guides

  Check

  • ?Draw it through the tip guide by hand before fishing

  Then

  • →Shorten the wrapped section
  • →Trim and melt the leader stub flush

• Wrap stack slides on the leader

  Check

  • ?The connection lets go progressively under a sustained run
  • ?Inspect step 03

  Then

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

• No half hitches over the wrap stack

  Check

  • ?The stack unwinds from the end once load cycles
  • ?Inspect step 04

  Then

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

• Leader spun with the bobbin, few real wraps laid

  Check

  • ?Looks wrapped, grips almost nothing
  • ?Inspect step 02

  Then

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

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

• FG Knot
• Alberto Knot