the.com/timber hitch
A knot that grips harder the more you pull, then vanishes the instant you stop.
self-tighteningTension locks it; slack frees it instantly
old jobHauled logs before chainsaws existed
minimum coilsThree tucks for slick rope, more for smooth
sailing cousinUsed to attach halyards to spars aboard ships
failure modeUseless without constant load on the line