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Adjusting shroud tension

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dixie03 View Drop Down
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Post Options Post Options   Quote dixie03 Quote  Post ReplyReply Direct Link To This Post Topic: Adjusting shroud tension
    Posted: 08 May 10 at 10:28pm
Please can someone tell me exactly how I physically adjust the tension in the shrouds?
Thank you in advance
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MattK View Drop Down
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Post Options Post Options   Quote MattK Quote  Post ReplyReply Direct Link To This Post Posted: 08 May 10 at 10:34pm
Please tell us more about the boat, what design is it, and why do you want to add more shroud tension?
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dixie03 View Drop Down
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Post Options Post Options   Quote dixie03 Quote  Post ReplyReply Direct Link To This Post Posted: 08 May 10 at 10:52pm
The boat is a RS Vision, just bought. When rigging the mast there is plenty of information in the manual on how to set the spreaders, but nothing on how to attach the shrouds. Looking on the RS owners forum, there is some guidance on the tension in the shrouds for different wind strengths, but how do you do this? By hand, ashore you can just about get the shrouds in to the top holes in the shroud thingumies connected to the deck.
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ham4sand View Drop Down
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Post Options Post Options   Quote ham4sand Quote  Post ReplyReply Direct Link To This Post Posted: 09 May 10 at 12:02am
loosen the forestay on the shore, move the shrouds to the
right hole on the "thingumies" then retension the forestay
John Hamilton
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Garry View Drop Down
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Post Options Post Options   Quote Garry Quote  Post ReplyReply Direct Link To This Post Posted: 09 May 10 at 10:18am
The rig tension, rake and prebend (spreaders) all
interact.
1 set the spreaders for the wind strength and
your weight.
2 put the shrouds in the hole that looks about right.
With the jib hoisted apply the rig tension (you adjust it
with the pull down arrangement that
attaches to the jib halyard).
3. Now check the mast is straight (side to side) by
sighting up it and measure the rake.
4. Take the rig tension off and move the shrouds then
repeat until at the required rig tension you have the
right rake.
5 Now check your prebend (spreader deflection). Keep
repeating until all your measurements are right. This is
your base position.

Then if its going to be very, very light or strong winds
go down one - two holes class guide should give an
indication.

If you're having trouble getting to a lower hole try
getting your crew to pull down on the cleated main
halyard to bend the tip of the mast towards you while you
fit the pin.

Raking the mast opens the slot (generally it also makes
the boat slightly faster upwind and slower downwind).

When you start to get overpowered you need to depower the
rig you do this by increasing the gnav, outhaul and
downhaul. If still oevrpowered you then start raking the
mast and shortening the spreaders. In the gusts ease the
main and if necessary the jib. Remember a flat boat is
faster than a heeled boat and the vision is a pig to
steer if you don't sail it flat.

PM your address if you want me to send you a CD with a
video / description of how to do it.

Garry

Edited by Garry
Garry

Lark 2252, Contender 298

www.cuckoos.eclipse.co.uk
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jake2010 View Drop Down
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Post Options Post Options   Quote jake2010 Quote  Post ReplyReply Direct Link To This Post Posted: 10 May 14 at 9:45pm
Hi Gary
I to have the same problem as dixie with regards to tentioning the shrouds , is there any sites that you know of that show a video of how to do this
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Ian29937 View Drop Down
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Post Options Post Options   Quote Ian29937 Quote  Post ReplyReply Direct Link To This Post Posted: 11 May 14 at 12:24am
Did you speak to RS, their after sales is pretty awesome?
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JimC View Drop Down
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Post Options Post Options   Quote JimC Quote  Post ReplyReply Direct Link To This Post Posted: 11 May 14 at 7:27am
The key point that I think is being missed is that the actual tension comes from tightening the jib halyard. Without the jib up and tensioned the shrouds should feel very slightly slack so that there isn't a permanent load on the hull when the boat isn't being used. The forestay is there just to hold the mast up when the jib is not in use: it's not normally active while sailing the Vision.
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Post Options Post Options   Quote MerlinMags Quote  Post ReplyReply Direct Link To This Post Posted: 11 May 14 at 10:43am
Jim is right. You choose which hole to use in the shroud 'metal thingummies' when the boat is on land with the sails down and everything loose.

Then you hoist the jib, and tighten the jib halyard more and more until you can grab the shroud and feel it tight. Sometimes you can twang it like a harp string to hear a (low) note.
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winging it View Drop Down
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Post Options Post Options   Quote winging it Quote  Post ReplyReply Direct Link To This Post Posted: 11 May 14 at 8:53pm
Is there not a friendly instructor at your club that can help?  Visions don't have a very sophisticated tuning guide - we have one as a club boat here - but the manual should have some data in it.  I will have a look at our boat and see which holes we use.
the same, but different...

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