spreader bars one set to many? - SailNet Community
 
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post #1 of 8 Old 07-13-2010 Thread Starter
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spreader bars one set to many?

my thompson t24 has 2 sets of spreaders, this model normaly has only one.
why? and whats the difference?

Last edited by jobi; 07-14-2010 at 08:23 AM.
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post #2 of 8 Old 07-13-2010
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Somebody built it that way

I would say its not the norm on most 24' boats

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post #3 of 8 Old 07-13-2010
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My guess is that the boat was dis-masted at some point and someone bought a used mast from some other type of boat which did normally have a double spreader rig. Double spreaders generally allow narrower genoa sheeting angles and smaller rig deflections while increasing the load on the rig and boat, and complicating tuning.


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post #4 of 8 Old 07-13-2010
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im on a 30' with one set.... the boats around me are bigger with one set (mostly)... i would take heed of Jeff H's comment that the increased load (esp. on a boat not originally rigged to bear this type of load) could prove problematic, as it seems that the spreaders may bear the load at the cost of yanking out your chainplates that were orig. rigged for diff. load bearing set-up

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post #5 of 8 Old 07-13-2010 Thread Starter
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someone sugested its to support the extra lb of in-mast reefing gear?

Thompsons have in-mast gear for quit sailing.
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post #6 of 8 Old 07-13-2010
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Jobi—

I would recommend you REMOVE, INSPECT and RE-BED the chain plates. They may be suffering from crevice corrosion and really need to be inspected.

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post #7 of 8 Old 07-13-2010
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ive been looking high and low for a 'load calculator' that translates I/J/P/E under sail @ a given wind speed on a boat with a given LOA to pressure on shrouds/chainplates at different points. Anyone know how to figure this? am i thinking of it the wrong way?
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post #8 of 8 Old 07-13-2010 Thread Starter
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I have tryed to remouve them when epoxying my deck, but these things ar bolted to the boat structure all the way to the hull.

each lateral chainplates ar at least 30in long, the wood on witch they ar bolted is solid with no sings of damage.

the only thing that needed rebeding on this boat was the lifeline posts brackets.

the rear and front chainplates are as solid as it gets, and riggins thick and like new.

one of the 4 laterald chainplates showed water leaking, I took it out epoxyied the wood and all screw holes then monted it back and voila ready to go.
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