Talk:2880: Sheet Bend

Why is this called a "sheet" bend? SystemParadox (talk) 21:17, 12 January 2024 (UTC)

I don't know the full answer but it's a sailing thing: the 'sheet' is the rope you pull in or let out to control the position of the sail. I guess bend describes the category of knot. 172.70.90.48 21:23, 12 January 2024 (UTC)

NO NO NO. The sheet is the sail. JohnB (talk) 21:36, 12 January 2024 (UTC)

It is the rope - Sheet (sailing). "In sailing, a sheet is a line (rope, cable or chain) used to control the movable corner(s) (clews) of a sail." 172.71.242.5 21:56, 12 January 2024 (UTC)

Huh. Dueling Wikipedia articles. The Sheet_bend article has a definition section that says the term "sheet bend" derives from its use bending ropes to sails (sheets). But the Sheet_(sailing) article says a sheet is a line used to control the movable corner(s) of a sail. JohnB (talk) 23:08, 12 January 2024 (UTC)

The sheet bend is named for its ability to to secure a sail, or sheet. You fold over the corner of the sail and that's one of your "ropes". The sheet bend is generally used as a knot for tying a large, inflexible rope (or rope-like object) to a smaller, more flexible rope.172.69.70.22 22:30, 12 January 2024 (UTC)

I would take the Ashley Book of Knots as authoritative. Sheet Bend is the first knot in the book, and is always (in modern terms) rope-to-rope, not to sail. It is one of the basic knots. https://en.wikipedia.org/wiki/The_Ashley_Book_of_Knots https://en.wikipedia.org/wiki/Sheet_bend

-- PRR (talk) 04:04, 13 January 2024 (please sign your comments with ~~~~)

I added a link to the wikipedia entry, it explains the name. Barmar (talk) 21:25, 12 January 2024 (UTC)

Presumably the "different loads" title text is a pun between electrical load and mechanical stress on the knot? Jim-at-home (talk) 21:56, 12 January 2024 (UTC)

“silver being joined to silver and gold being joined to gold within the insulating white cable” is not the conventional way to join cables. Unless you are joining one cable to itself (like a Möbius strip), you have two cables with insulation. And usually you use non-cursed connectors, where you first remove the insulation at the end of the cable and then crimp or solder the conductors to metal parts of the connector; or solder the conductors and then add a different type of insulation for protection; or use screw terminals;... Only with insulation displacement connectors you keep using all the insulation of the two cables. And finally, conductors are usually copper or aluminum, and very rarely silver and gold. --162.158.94.141 08:45, 13 January 2024 (UTC)

I think the gold and silver is just color coded for the reader. Not that they are meant to indicate that the conductors are made from this material. Apart from that you comment sounds like you know what you are talking about. So please improve the explanation if you can. --Kynde (talk) 10:58, 13 January 2024 (UTC)

Okay I looked at the wikipedia article and the knot depicted in the comic looks like a right handed one. I still don't know why it's called right handed, or why the left handed one is insecure.198.41.236.207 11:46, 13 January 2024 (UTC)

A note I nearly added in the bit about short-circuits (or, as I added, 'un'circuiting) is that the electrical behaviour of the knot is different according to which 'end' slips. If the left-side cable 'slips through' enough, then its gold and silver bits of sheath could contact (would short-circuit any current driven at that side). If the right-side cable slips out, it is in no danger of doing so for a right-driven current (it would just disconnect). That ignores the cross-talking that could occur (on one conducting line at a time, so may not matter if there's no external ground-return element, except as far as not being a proper connection any more), or both ends slipping (where one of the LHS sheaths might shuffle into a position to bridge the two RHS sheaths). But, as tied, the LHS silver (being bent in and out of the page around its crossing counterpart wire) seems unlikely to be pressed against both gold and silver, should it trivially untwine/slip through. Actual studies with actual knots might be useful. I thought I had a spare length of unterminated Cat5, nearby, but apparently (k)not... that, with some coloured permanent marker-pen marks made upon it, would probably have made a decent analogue for visual analysis of failure conditions. Maybe I'll de-plug an old cable (I've got a number of damaged USB cables I could chop, but their being thinner would change the scale and dynamics of the knot, meaning I might as well just use a scrap of twisted-pair internally-sheathed strands). – But I thought you'd like my mind's-eye analysis of the knot behaviour, before I get around to trying anything practical to this end. 141.101.99.7 17:08, 13 January 2024 (UTC) (<- ex Cub-/Boy-/Venture-Scout, but never got any Knot Untying badge... that brief stint with escapology aside... ;) )