144:
25:
122:
552:
200:. Horizontal windlasses make use of an integral gearbox and motor assembly, all typically located above-deck, with a horizontal shaft through the unit and wheels for chain and/or rope on either side. Vertical capstans use a vertical shaft, with the motor and gearbox situated below the winch unit (usually below decks).
483:
233:
The wheels on either a vertical or horizontal windlass provide for either chain or line to be engaged. The wheel for line is termed a warping head, while the chain handling wheel is variously referred to as the gypsy (in the UK) or wildcat (in North
America). For clarity in communication the generic
224:
of the cable is connected to the bitts using the bitter pin, which should be able to be released from outside the locker to "slip" the anchor. This would occur if the windlass brake has slipped (in a storm, for example) and the cable has reached "the bitter end". This is the origin of the term "to
203:
Horizontal windlasses offer several advantages. The unit tends to be more self-contained, protecting the machinery from the corrosive environment found on boats. The dual wheels also allow two anchors on double rollers to be serviced. Vertical capstans, for their part, allow the machinery to be
241:
Nowadays, especially on large tankers and cruise ships, the windlass may be split into independent port and starboard units. In these cases they are frequently coupled with warping drums (as distinct from warping heads). In some of these the warping drums are of the self tensioning or constant
237:
It is important that the chainwheel match the chain size (i.e. the link pitch) closely. Even a small difference in link size or consistency can cause undue wear on the chainwheel and/or cause the chain to jump off the windlass when the winch is operating, particularly during payout, a runaway
215:
The anchor is shackled to the anchor cable (US anchor chain), the cable passes up through the hawsepipe, through the pawl, over the windlass gypsy (US wildcat) down through the "spurling pipe" to the chain/cable locker under the forecastle (or poop if at the stern (US fantail)) - the anchor
179:
A trawl windlass is a similar machine that restrains or manipulates the trawl on a commercial fishing vessel. The trawl is a sort of big fishing net that is wound on the windlass. The fishermen either let-out the trawl or heave-up the trawl during fishing operations. A brake is provided for
512:
After hoisting the anchor and setting the windlass brake, the claw is placed on a chain link and the turnbuckle is tightened to take up the tension on the chain. If more than one stopper is used, the turnbuckles can be adjusted to evenly distribute the load.
234:
term chainwheel is often used. On small craft a warping drum is sometimes used to handle both chain & rope, although particular care must be taken with sizing and compatibility of line, chain, and windlass, for this feature to work effectively.
320:
161:
is a machine used on ships that is used to let-out and heave-up equipment such as a ship's anchor or a fishing trawl. On some ships, it may be located in a specific room called the windlass room.
204:
placed below decks, thus lowering the center of gravity (important on boats), and also allow a flexible angle of pull (which means rope or chain can be run out to different fair leads).
516:
A devil's claw cannot be released while it is under tension. To release it, the tension must first be taken up by the windlass brake. Then the turnbuckle can be loosened and removed.
467:
Powered solutions include steam (antiquated), hydraulics, and electrics. Electrics are convenient and relatively cheap, but hydraulics may be more efficient and powerful if available.
474:
and all its rode (chain and rope) so that the anchor and rode hang suspended in deep water. This task should be within the windlass' rated working pull, not its maximum pull.
377:
350:
451:
421:
397:
225:
the bitter end". It originally applied in sailing vessels where the cable was a rope, and the windlass or capstan was powered by many sailors below decks.
584:
491:
207:
It tends to be the case that smaller boats use capstans, and larger boats have windlasses, although this is by no means a hard and fast rule.
263:
456:
While many modern windlasses require an external power source, many remain manually driven in the same manner as most sailing boats'
250:
The mechanical advantage of a windlass is derived from the pulling force being multiplied by wrapping the rope around the drum.
498:, usually attached at the base of the anchor windlass, and a metal hook with two curved fingers that grab one link of a chain.
89:
61:
577:
556:
68:
108:
42:
180:
additional control. The windlass is usually powered by an electric or hydraulic motor operating via a gear train.
75:
916:
570:
46:
176:
to be raised and lowered by means of chain cable. A notched wheel engages the links of the chain or the rope.
57:
423:
is the total angle swept by all turns of the rope, measured in radians (i.e., with one full turn the angle
355:
328:
426:
153:. The hydraulically operated brake and pawl allows the anchor to be dropped from the ship's bridge.
625:
400:
35:
921:
82:
406:
382:
8:
720:
680:
505:
because it is lighter and easier to manage than other types of chain stoppers, such as a
148:
885:
880:
850:
805:
735:
670:
197:
136:
750:
745:
695:
690:
534:"Bitter end | Etymology, origin and meaning of phrase bitter end by etymonline"
238:
condition sometimes referred to as "water spouting" should it occur at high speed.
730:
655:
254:
130:
835:
815:
461:
221:
825:
785:
705:
665:
533:
470:
In general, windlasses and their power system should be capable of lifting the
910:
502:
770:
700:
594:
506:
562:
845:
820:
715:
710:
685:
605:
790:
725:
650:
640:
495:
482:
143:
126:
217:
890:
860:
800:
795:
610:
24:
870:
810:
780:
755:
660:
630:
189:
775:
760:
740:
675:
379:
is the resulting force exerted at the other side of the capstan,
193:
135:. The vertical shaft is rotated by crew driving a portion of the
121:
315:{\displaystyle T_{\text{load}}=T_{\text{hold}}\ e^{\mu \phi }~,}
147:
The combined port anchor windlass and winch of the modern ferry
875:
865:
830:
615:
551:
471:
173:
895:
855:
645:
635:
457:
169:
840:
765:
168:
is a machine that restrains and manipulates the anchor
253:
The math for such force phenomena is described by the
429:
409:
385:
358:
331:
266:
494:
to grab and hold an anchor chain. It consists of a
49:. Unsourced material may be challenged and removed.
445:
415:
391:
371:
344:
314:
210:
908:
490:The devil's claw is a device that is used as a
486:Securing a devil's claw on a large anchor chain
220:are on a bulkhead in the cable locker and the
578:
403:between the rope and capstan materials, and
592:
585:
571:
442:
183:
109:Learn how and when to remove this message
481:
196:. Vertical designs are correctly called
142:
120:
245:
228:
909:
566:
129:on the main deck of the sailing ship
352:is the applied tension on the line,
47:adding citations to reliable sources
18:
13:
14:
933:
544:
16:Weightlifting device inside ships
550:
501:A devil's claw is often used on
188:Technically speaking, the term "
23:
477:
372:{\displaystyle T_{\text{hold}}}
345:{\displaystyle T_{\text{load}}}
34:needs additional citations for
526:
211:The links from bitts to anchor
125:An anchor windlass within the
1:
519:
446:{\displaystyle \phi =2\pi \,}
192:" refers only to horizontal
7:
10:
938:
601:
172:on a boat, allowing the
626:Apparent wind indicator
401:coefficient of friction
487:
447:
417:
393:
373:
346:
316:
184:Horizontal or vertical
154:
140:
917:Watercraft components
485:
448:
418:
416:{\displaystyle \phi }
394:
374:
347:
317:
146:
124:
559:at Wikimedia Commons
427:
407:
392:{\displaystyle \mu }
383:
356:
329:
264:
246:Mechanical advantage
229:Gypsies and wildcats
43:improve this article
488:
443:
413:
389:
369:
342:
312:
155:
141:
904:
903:
557:Anchor windlasses
555:Media related to
366:
339:
308:
292:
287:
274:
257:. The formula is
119:
118:
111:
93:
58:"Anchor windlass"
929:
681:Carpenter's walk
587:
580:
573:
564:
563:
554:
538:
537:
530:
452:
450:
449:
444:
422:
420:
419:
414:
398:
396:
395:
390:
378:
376:
375:
370:
368:
367:
364:
351:
349:
348:
343:
341:
340:
337:
321:
319:
318:
313:
306:
305:
304:
290:
289:
288:
285:
276:
275:
272:
255:Capstan equation
150:Stena Britannica
114:
107:
103:
100:
94:
92:
51:
27:
19:
937:
936:
932:
931:
930:
928:
927:
926:
907:
906:
905:
900:
816:Quarter gallery
621:Anchor windlass
597:
591:
547:
542:
541:
532:
531:
527:
522:
480:
428:
425:
424:
408:
405:
404:
384:
381:
380:
363:
359:
357:
354:
353:
336:
332:
330:
327:
326:
297:
293:
284:
280:
271:
267:
265:
262:
261:
248:
231:
213:
186:
166:anchor windlass
115:
104:
98:
95:
52:
50:
40:
28:
17:
12:
11:
5:
935:
925:
924:
919:
902:
901:
899:
898:
893:
888:
883:
878:
873:
868:
863:
858:
853:
848:
843:
838:
833:
828:
823:
818:
813:
808:
803:
798:
793:
788:
783:
778:
773:
771:Keel (Canting)
768:
763:
758:
753:
748:
743:
738:
733:
728:
723:
718:
713:
708:
703:
698:
693:
688:
683:
678:
673:
668:
663:
658:
653:
648:
643:
638:
633:
628:
623:
618:
613:
608:
602:
599:
598:
590:
589:
582:
575:
567:
561:
560:
546:
545:External links
543:
540:
539:
524:
523:
521:
518:
503:merchant ships
479:
476:
441:
438:
435:
432:
412:
388:
362:
335:
323:
322:
311:
303:
300:
296:
283:
279:
270:
247:
244:
242:tension type.
230:
227:
212:
209:
185:
182:
117:
116:
31:
29:
22:
15:
9:
6:
4:
3:
2:
934:
923:
920:
918:
915:
914:
912:
897:
894:
892:
889:
887:
884:
882:
879:
877:
874:
872:
869:
867:
864:
862:
859:
857:
856:Stern or poop
854:
852:
849:
847:
844:
842:
839:
837:
834:
832:
829:
827:
824:
822:
819:
817:
814:
812:
809:
807:
804:
802:
799:
797:
794:
792:
789:
787:
784:
782:
779:
777:
774:
772:
769:
767:
764:
762:
759:
757:
754:
752:
749:
747:
744:
742:
739:
737:
734:
732:
729:
727:
724:
722:
719:
717:
714:
712:
709:
707:
704:
702:
699:
697:
694:
692:
689:
687:
684:
682:
679:
677:
674:
672:
669:
667:
664:
662:
659:
657:
654:
652:
649:
647:
644:
642:
639:
637:
634:
632:
629:
627:
624:
622:
619:
617:
614:
612:
609:
607:
604:
603:
600:
596:
588:
583:
581:
576:
574:
569:
568:
565:
558:
553:
549:
548:
535:
529:
525:
517:
514:
510:
508:
504:
499:
497:
493:
492:chain stopper
484:
475:
473:
468:
465:
463:
459:
454:
439:
436:
433:
430:
410:
402:
386:
360:
333:
309:
301:
298:
294:
281:
277:
268:
260:
259:
258:
256:
251:
243:
239:
235:
226:
223:
219:
208:
205:
201:
199:
195:
191:
181:
177:
175:
171:
167:
162:
160:
152:
151:
145:
138:
134:
133:
128:
123:
113:
110:
102:
99:December 2009
91:
88:
84:
81:
77:
74:
70:
67:
63:
60: –
59:
55:
54:Find sources:
48:
44:
38:
37:
32:This article
30:
26:
21:
20:
922:Ship anchors
836:Ship's wheel
701:Companionway
620:
595:sailing ship
528:
515:
511:
507:pelican hook
500:
489:
478:Devil's claw
469:
466:
455:
324:
252:
249:
240:
236:
232:
214:
206:
202:
187:
178:
165:
163:
158:
156:
149:
131:
105:
96:
86:
79:
72:
65:
53:
41:Please help
36:verification
33:
821:Quarterdeck
711:Daggerboard
706:Crow's nest
686:Centreboard
656:Bow or prow
606:Aftercastle
593:Parts of a
911:Categories
791:Orlop deck
726:Forecastle
721:Figurehead
651:Boom brake
641:Bilgeboard
520:References
496:turnbuckle
222:bitter end
127:forecastle
69:newspapers
891:Whipstaff
861:Sternpost
851:Starboard
801:Poop deck
796:Outrigger
611:Afterdeck
440:π
431:ϕ
411:ϕ
387:μ
302:ϕ
299:μ
132:Balclutha
871:Taffrail
811:Porthole
781:Leeboard
756:Jackline
661:Bowsprit
631:Beakhead
198:capstans
190:windlass
159:windlass
886:Transom
761:Jibboom
741:Gunwale
736:Gangway
696:Cockpit
676:Cathead
671:Capstan
458:winches
399:is the
194:winches
137:capstan
83:scholar
876:Tiller
866:Strake
831:Rudder
776:Kelson
691:Chains
616:Anchor
472:anchor
462:sheets
325:where
307:
291:
174:anchor
139:above.
85:
78:
71:
64:
56:
896:Winch
731:Frame
666:Cable
646:Bitts
636:Bilge
218:bitts
170:chain
90:JSTOR
76:books
846:Stem
841:Skeg
806:Port
786:Mast
766:Keel
751:Hull
746:Head
716:Deck
460:for
365:hold
338:load
286:hold
273:load
62:news
881:Top
826:Rib
464:.
453:).
164:An
45:by
913::
509:.
157:A
586:e
579:t
572:v
536:.
437:2
434:=
361:T
334:T
310:,
295:e
282:T
278:=
269:T
112:)
106:(
101:)
97:(
87:·
80:·
73:·
66:·
39:.
Text is available under the Creative Commons Attribution-ShareAlike License. Additional terms may apply.
