Rig Tension - Amount of purchase required?

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Chris G
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Joined: Fri Nov 13, 2020 2:28 pm

Rig Tension - Amount of purchase required?

Post by Chris G » Sun Nov 15, 2020 4:40 pm

Hi All,

New to International Canoes and having bought one a couple of months ago and sailed it a few times, its time for some changes over the winter. Currently the rig tension is applied through the forestay and I'm looking to make the shrouds adjustable on the water so I can release them offwind. My question is, what sort of purchase do I need for workable system? Also, what sort of travel do I need ie how much do the shrouds need to be released to be effective?

Thanks in advance!!

Chris G

chrishampe
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Location: Plymouth, Devon, UK

Re: Rig Tension - Amount of purchase required?

Post by chrishampe » Mon Nov 16, 2020 7:24 pm

I have 15-1 on my boat, But anywhere in the 12-1 to 18-1 range should work
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Chris G
Posts: 10
Joined: Fri Nov 13, 2020 2:28 pm

Re: Rig Tension - Amount of purchase required?

Post by Chris G » Mon Nov 16, 2020 9:37 pm

Thanks Chris. Struggling to find pictures.
This looks like 4:1 on a 3:1 so 12:1?

http://www.c12performanceboats.co.uk/im ... 20seat.jpg

Chris G

Chris G
Posts: 10
Joined: Fri Nov 13, 2020 2:28 pm

Re: Rig Tension - Amount of purchase required?

Post by Chris G » Mon Nov 16, 2020 11:05 pm

Found this old thread. 18:1 or 24:1 with 150mm to 200mm travel? Seems about right? Also suggests the HK313 38mm wire blocks. I was thinking the 25mm versions HK300 or Seldon, Allen, Seaside equivalent?

viewtopic.php?f=9&t=558&start=15

chrishampe
Posts: 268
Joined: Sat Feb 02, 2008 12:24 pm
Location: Plymouth, Devon, UK

Re: Rig Tension - Amount of purchase required?

Post by chrishampe » Mon Nov 16, 2020 11:14 pm

Better to use low friction rings on the first part if tje purchade at the shroud ends in my opinion. The 1" wire blocks are too close to the limit. Are you in the Canoe facebook group: facebook.com/groups/sail.ic

Its easier to post pics there and is much more active than this forum
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Chris Hampe
GBR 340 Monkey's Uncle

Chris G
Posts: 10
Joined: Fri Nov 13, 2020 2:28 pm

Re: Rig Tension - Amount of purchase required?

Post by Chris G » Tue Nov 17, 2020 5:13 pm

Don't do the Facebook thing but I have had a browse there. Assume you could email pictures from here? Many of the links on here don't work anymore it seems.

C

Chris G
Posts: 10
Joined: Fri Nov 13, 2020 2:28 pm

Re: Rig Tension - Amount of purchase required?

Post by Chris G » Tue Nov 17, 2020 5:22 pm

Ha ha. Seems not able to email pictures. Just tried it.

C

chrishampe
Posts: 268
Joined: Sat Feb 02, 2008 12:24 pm
Location: Plymouth, Devon, UK

Re: Rig Tension - Amount of purchase required?

Post by chrishampe » Thu Nov 26, 2020 8:20 pm

I managed to get down to the boat park and take some pictures of my shroad adjustment setup:- https://photos.app.goo.gl/5WuiVA9k4CkRZwrP7
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Chris Hampe
GBR 340 Monkey's Uncle

Chris G
Posts: 10
Joined: Fri Nov 13, 2020 2:28 pm

Re: Rig Tension - Amount of purchase required?

Post by Chris G » Sat Dec 19, 2020 5:55 pm

Thanks Chris - looks like 5:1 on 3:1 so 15:1 overall?

Chris G

chrishampe
Posts: 268
Joined: Sat Feb 02, 2008 12:24 pm
Location: Plymouth, Devon, UK

Re: Rig Tension - Amount of purchase required?

Post by chrishampe » Sun Dec 20, 2020 12:42 am

Yes 15-1, Ok most of the time but tough to pull on when windy, But in those conditions I tend not to ease the shrouds off anyway.

When you look at what actually gets eased on the shroud end All you are doing is releaseing tension in the leeward shroud to allow the mast to stand more upright. I dont suspect there is any canoe as presently rigged that is set to ease the shrouds enough to square the boom off downwind as you might do in boats such as a natioanl 12. Part of the reason is due to the canoes narrow shroud base which tends to result in a compromise of having the shrouds further aft compared to other classes, thus limiting boom squaring downwind.

Personaly I think we will soon be transitioning to hotting angles downwind as we continue to develop our rigs in the hunt for more power.
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Chris Hampe
GBR 340 Monkey's Uncle

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