
05-12-2011
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Just another Moderator
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Join Date: Sep 2005
Location: New Westminster, BC
Posts: 9,272
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Quote:
Originally Posted by sandycohen
What are in-line spreaders?
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Looking at your rig, if the spreaders are in line with the boat's beam they are 'in-line'. As such, with single lowers your shrouds provide no aft support for the mast.
On many rigs (esp recently, but many Hunters are extreme examples of this) the spreaders rake back (aft) anywhere between 15-30 degrees or more. As such the forestay and the shrouds form a 'tripod' of support for the mast, with the backstay mainly used for luff tension and mast bend control. This arrangement means the mast won't try and rock forward if the backstay is slacked off.
On boats with in-line spreaders the only aft support for the mast is provided by the backstay unless checkstays or runners are involved.
I should qualify this by saying many rigs have double (fore and aft) lower shrouds which will similarly support the mast, but only as far up as the spreaders, with the backstay then supporting primarily the upper panel above the spreaders.
__________________
".. there is much you could do at sea with common sense.. and very little you could do without it.."
Capt G E Ericson (from "The Cruel Sea" by Nicholas Monsarrat)
1984 Fast/Nicholson 345
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