What are Caps?
Printed From: Yachts and Yachting Online
Category: General
Forum Name: Beginner questions
Forum Discription: Advice for those who are new to sailing
URL: http://www.yachtsandyachting.com/forum/forum_posts.asp?TID=5655
Printed Date: 26 Jun 25 at 11:33pm
Software Version: Web Wiz Forums 9.665y - http://www.webwizforums.com
Topic: What are Caps?
Posted By: ellistine
Subject: What are Caps?
Date Posted: 25 Jun 09 at 4:00pm
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I'd assumed that it's just another name for the lowers. Am I wrong?
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Replies:
Posted By: Smight at BBSC
Date Posted: 25 Jun 09 at 4:03pm
Cap Shrouds are the set of shrouds also called uppers that basically stop the top of the mast bending forward when the kite is up when the head of the kite is further up the mast than the point where the standard shrouds attach eg a mast head kite. But I'm sure there is someone on here with a much better explination.
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RS600 988
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Posted By: alstorer
Date Posted: 25 Jun 09 at 4:22pm
Properly, cap shrouds go all the way to the mast head, as distinct from upper shrouds, which might only go 9/10s (or less) of the way up, as I understand it.
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Al
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Posted By: ellistine
Date Posted: 25 Jun 09 at 4:36pm
So if you look at this picture;
http://www.flickr.com/photos/njw28/514914195/sizes/o/ -
RS800
The Shrouds meet the mast where the trapeze wires do and
the caps go from the base of the mast, around the spreaders
to the top (or nearly) of the mast?
How are the caps tensioned?
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Posted By: Smight at BBSC
Date Posted: 25 Jun 09 at 5:03pm
The caps on the 800 and most boats just have a purchase system attached to the bottom of the shrouds.
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RS600 988
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Posted By: laser193713
Date Posted: 25 Jun 09 at 5:38pm
Caps control the bend of the top of the mast, on the 800 they are controlled by purchases because they need to be adjusted regularly but on yachts it would be done with standard bottle screws.
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Posted By: Jack Sparrow
Date Posted: 25 Jun 09 at 6:38pm
There are lots of different ways to rig a mast that allow it to perform in different ways. But essentially Caps on dinghy's are used on boats that have mast head kites. To support the mast from the loads. They also allow you to control the pre-bend and rig reaction for tuning and gust response.
http://www.flickr.com/photos/16146533@N08/3659834593/sizes/l/ - picture link
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Posted By: ellistine
Date Posted: 25 Jun 09 at 7:20pm
Thanks Jack. A very definitive diagram!
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