Snug rig loses tension downwind

Submitted by SavageViews on Mon, 11/03/2008 - 07:58
I was out in 20kts this weekend and when on a beam/broad reach the jib would noticeably loose tension (sagging between hanks). Is that normal for a snug rig, or is my boat/deck flexing too much? I did not add tension to the jib halyard, so that may have fixed it, but I expect that upwind it would have been too tight. I have a couple of reasons to suspect the deck: I replace the mahogany tabernacle, and recently discovered core issues around the starboard chainplate. Just trying to figure out if anyone else has observed this?
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Comments

Very normal in all dinghies without a backstay, Scots included.

Submitted by Hot Wheels on Mon, 11/03/2008 - 13:01.
Very normal in all dinghies without a backstay, Scots included. Nothing to worry about. It's actually fast on a jib reach. Other classes with adjustable shrouds [using hyfield levers or block & tackle] encourage big jib stay sag on a reach as it is fast. Check out a Snipe, Star, 505, etc.

One thing to consider is the tension of your jib halyard.

Submitted by JHS on Mon, 11/03/2008 - 13:37.
One thing to consider is the tension of your jib halyard. Was it properly tensioned? The toggle plate under the foredeck should be horizontal: http://www.flyingscot.com/graphics/rig3d.gif "If the sea did wild or wicked things, it was because she could not help them." - Hemmingway

Thanks for the help! That makes sense about the backstay.

Submitted by SavageViews on Mon, 11/03/2008 - 19:48.
Thanks for the help! That makes sense about the backstay. I was going to point that out about the toggle...it's completely lopsided (max-extent) to the forestay side. I thought that is what the North Snug tuning guide suggested: It is no longer necessary to use the toggle to set your rake, jib luff tension or slop in the rig. In fact, you will never ever need to look at it again; your forestay will take the entire rig load while your jib halyard will simply adjust cloth tension.

[:)][:)] Perfectly normal and usually very fast.

Submitted by FS5257 on Mon, 11/03/2008 - 21:33.
[:)][:)] Perfectly normal and usually very fast.

As the North guide states, the toggle should be completely lopsi

Submitted by Hot Wheels on Tue, 11/04/2008 - 19:10.
As the North guide states, the toggle should be completely lopsided to the forestay side with the snug rig.

If the rig rocks forward slightly downwind, which is normal on a

Submitted by mmittman on Tue, 12/30/2008 - 17:54.
If the rig rocks forward slightly downwind, which is normal on a non-backstay dinghy, its an advantage, this slightly opens the slot between the main and spin. Go fast! Have fun! -Michael
quote:
[i]Originally posted by SavageViews[/i] [br]I was out in 20kts this weekend and when on a beam/broad reach the jib would noticeably loose tension (sagging between hanks). Is that normal for a snug rig, or is my boat/deck flexing too much? I did not add tension to the jib halyard, so that may have fixed it, but I expect that upwind it would have been too tight. I have a couple of reasons to suspect the deck: I replace the mahogany tabernacle, and recently discovered core issues around the starboard chainplate. Just trying to figure out if anyone else has observed this?
Michael Mittman FS# 5804, Fleet 23 Corinthian Sailing Club White Rock Lake Dallas, TX

Michael Mittman

FS 5804, Fleet 23

Corinthian Sailing Club

White Rock Lake, Dallas, TX, USA