FACTOID # 115: American planes take-off a staggering 8.5 million times per year - almost half the number of take-offs worldwide.
 
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Encyclopedia > Winch
Modern self-tailing winch on a sailing boat. Here, the line winched is a jib or spinnaker sheet which runs from the sail (upper left, not shown) to a block (lower right,not shown) and from there to the lower part of the winch. The handle is detachable to facilitate handling of the line.
Modern self-tailing winch on a sailing boat. Here, the line winched is a jib or spinnaker sheet which runs from the sail (upper left, not shown) to a block (lower right,not shown) and from there to the lower part of the winch. The handle is detachable to facilitate handling of the line.
Largest winch in the world
Largest winch in the world

A winch is a mechanical device that is used to wind up a rope or wire rope (also called "cable"). In its simplest form it consists of a spool and attached crank. The spool can also be called the winch drum. More elaborate designs have gear assemblies and can be powered by electric, hydraulic, pneumatic or internal combustion drives. Some may include a solenoid brake and/or a mechanical brake or ratchet that prevents it from unwinding. Image File history File links Download high resolution version (1200x900, 2326 KB) Summary Winch in a sailing boat Licensing File links The following pages link to this file: Winch ... Image File history File links Download high resolution version (1200x900, 2326 KB) Summary Winch in a sailing boat Licensing File links The following pages link to this file: Winch ... A typical jib on a small yacht A jib is a triangular staysail set ahead of the foremost mast of a sailing boat. ... It has been suggested that gennaker be merged into this article or section. ... In sailing, a sheet is a line (or rope) used to control the moveable corner(s) of a sail. ... In sailing, a block is a pulley or a number of pulleys enclosed in sheaves so as to be fixed to the end of a line or to a spar or surface. ... Image File history File links MLDW.JPG‎ Mooring Line Deployment Winch on Balder. ... Image File history File links MLDW.JPG‎ Mooring Line Deployment Winch on Balder. ... Coils of rope used for long-line fishing A rope (IPA: ) is a length of fibers, twisted or braided together to improve strength for pulling and connecting. ... Steel wire rope (right hand lay) Wire rope consists of several strands laid (or twisted) together like a helix. ... A crank is a bent portion of an axle, or shaft, or an arm keyed at right angles to the end of a shaft, by which motion is imparted to or received from it; also used to change circular into reciprocating motion, or reciprocating into circular motion. ... Spur gears found on a piece of farm equipment A gear wheel is a wheel with teeth around its circumference, the purpose of the teeth being to mesh with similar teeth on another mechanical device -- possibly another gear wheel -- so that force can be transmitted between the two devices in... Hydraulics is a branch of science and engineering concerned with the use of liquids to perform mechanical tasks. ... Pneumatics, from the Greek πνευματικός (pneumatikos, coming from the wind) is the use of pressurized air in science and technology. ... An internal combustion engine is an engine that is powered by the expansion of hot combustion products of fuel directly acting within an engine. ... A Solenoid Brake is an electrically controlled brake that is used, along with a mechanical brake, to manage the load on a cargo winch. ... A ratchet featuring a pawl (a) and a gearwheel (b) A ratchet lever hoist. ...


Besides industrial applications (e.g. in cranes), winches are used for towing cars, boats, or gliders. There are several winches on almost every boat or ship where they are used to pull anchor or mooring lines, halyards, and sheets. Tower crane An old crane with incline of pivoted boom controlled by means of chains, sprockets and gears. ... Gliders or Sailplanes are heavier-than-air aircraft primarily intended for unpowered flight. ... A stocked ships anchor. ... In sailing, a halyard is a line (rope) that is used to hoist (pull up) a sail or a yard to which a sail has been attached (bent on). ...


The rope is usually stored on the winch, but a similar machine that does not store the rope is called a capstan. When trimming a line on a sailboat, the crew member turns the winch handle with one hand, while tailing (pulling on the loose tail end) with the other to maintain tension on the turns. Some winches have a "stripper" or cleat to maintain tension. These are known as "self-tailing" winches [1]. A portion of a model depicting a manual capstan in use. ...


Winches are frequently used as elements of backstage mechanics to move scenery in large theatrical productions. Winches are often embedded in the stage floor and used to move large set pieces on and off. Theatrical scenery is things that are used as setting for a theatrical production. ...

Contents

History

The earliest literary reference to a winch can be found in the account of Herodotus of Halicarnassus on the Persian Wars (Histories 7.36), where he describes how wooden winches were used to tighten the cables for a pontoon bridge across the Hellespont in 480 B.C. Winches may have been employed even earlier in Assyria. By the 4th century BC, winch and pulley hoists were regarded by Aristotle as common for architectural use (Mech. 18; 853b10-13).[2] Herodotus was an ancient historian who lived in the 5th century BC (484 BC - c. ... It has been suggested that this article be split into multiple articles. ... For other uses, see Assyria (disambiguation). ... Aristotle (Greek: Aristotélēs) (384 BC – March 7, 322 BC) was a Greek philosopher, a student of Plato and teacher of Alexander the Great. ...


The largest winch in the world is placed on the Balder.[citation needed] It is used as a Mooring Line Deployment Winch with a diameter of 10.5 meter and a SWL (Safe Working Load) of 275 MT. The DCV Balder is a Deepwater Construction Vessel operated by Heerema. ...


External links

Winches for cars

Look up Winch in
Wiktionary, the free dictionary.
  • Articles about the use of winches for cars

Wikipedia does not have an article with this exact name. ... It has been suggested that French Wiktionary be merged into this article or section. ... H2G2 is also an acronym for the The Hitchhikers Guide to the Galaxy. ...

Winches for trucks

  • Articles about the use of winches for trucks
    • Choosing an Electric or Hydraulic Winch

Winches for boats

General use winches

  • Production of general use winches

Footnotes

  1. ^ Mark Smith. The Annapolis Book of Seamanship. 1999 Simon & Schuster
  2. ^ J. J. Coulton, “Lifting in Early Greek Architecture,” The Journal of Hellenic Studies, Vol. 94. (1974), pp. 1-19 (12)

  Results from FactBites:
 
Winch - Wikipedia, the free encyclopedia (362 words)
Here, the line winched is a jib or spinnaker sheet which runs from the sail (upper left, not shown) to a block (lower right,not shown) and from there to the lower part of the winch.
Winches are often embedded in the stage floor and used to move large set pieces on and off.
The earliest literary reference to a winch can be found in the account of Herodotus of Halicarnassus on the Persian Wars (Histories 7.36), where he describes how wooden winches were used to tighten the cables for a pontoon bridge across the Hellespont in 480 B.C. Winches may have been employed even earlier in Assyria.
Peter Winch - Wikipedia, the free encyclopedia (957 words)
Peter Guy Winch (1926-1997) was a British philosopher known for his contributions to the philosophy of the social sciences, Wittgenstein scholarship, ethics, and the philosophy of religion.
Winch is perhaps most famous for his early book, The Idea of a Social Science and its Relation to Philosophy (1958), an attack on positivism in the social sciences, drawing on the work of R.
With the decline of interest in Wittgenstein, Winch himself was increasingly neglected and the challenge his arguments presented to much contemporary philosophy was sidestepped or ignored.
  More results at FactBites »


 

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