Boom hits back stay when running.

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Dreamweaver
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Joined: Sat Nov 13, 2021 7:48 am
Investigator Boat Name: Dream Weaver

Boom hits back stay when running.

Post by Dreamweaver »

How to adjust stays so boom does not hit back stay when running.?
Or Adjust Boom vang?
Watto
Posts: 139
Joined: Tue Jan 19, 2021 7:45 pm
Investigator Boat Name: Ex - Fathom #82

Re: Boom hits back stay when running.

Post by Watto »

More backstay tension?. I kinda have to lift my boom to put it on the hook.
Last edited by Watto on Mon Nov 15, 2021 7:40 pm, edited 1 time in total.
Luke

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Fathom
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Peter T
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Investigator Boat Name: Sail- La- Vie
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Re: Boom hits back stay when running.

Post by Peter T »

I would check your mast rake. My understanding is that the mast should be close to vertical. Then check the vang which will stop the outboard end of the boom from going too high. Also, you could
add a bit if tension to the back stay.
Hope this helps
Cheers
Regards Peter T
" Sail-La-Vie," # 114


"Believe me, my young friend, there is nothing - absolutely nothing - half so much worth doing as simply messing about in boats."
Dreamweaver
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Re: Boom hits back stay when running.

Post by Dreamweaver »

Cheers thanks
How tight should your died stays be .
Watto
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Investigator Boat Name: Ex - Fathom #82

Re: Boom hits back stay when running.

Post by Watto »

Side stays?

I tightened my ones a notch when I noticed a lot of slack on the leeward side when sailing.
Luke

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Fathom
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Peter T
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Re: Boom hits back stay when running.

Post by Peter T »

How to tell if your shrouds are too tight.
Adjusting the standing rigging may seem straight forward, simply tighten the stays until the mast is in column and in the correct order that way everything lines up and works well together. The problem is, how tight is tight enough?

You don't want to over tighten the stays because the additional stress is just that, additional stress. This stress is transmitted to the spar, the mast tanks, the chainplates, the hull, pretty much everything that is involved with the rigging will now be subjected to unnecessary additional stress.

There are two ways to check the tightness of the rigging, one is at the dock, the second is while sailing.

The dockside check is rather simple, all you need to do is feel how tight the cap shrouds are. They should be tight enough that when you push or pull on them, they don't want to jiggle around too much. If they feel loose or floppy, you need to tighten them further.

Once the cap shrouds are set, the rest of the shrouds simply follow in sequential order with none of them being tighter than the cap shrouds.

The second method, and the preferred method, is to sail test the rigging. This will subject the yacht to the real loads that it is expected to perform under. If the mast is not in column while sailing, the windward shrouds are too loose and need to be tensioned further. If the mast is in column but the leeward shrouds are floppy, the leeward shrouds need to be tightened to remove the slack.

Eventually, rigging perfection will be reached where the shrouds are the perfect tightness. The mast remains in column on all points of sail and the shrouds never go dangling slack.

The reason really slack leeward shrouds are a hazard are all due to the practical effects they can have on the rigging.

If the cap shroud were to slip out of the spreader tip, it would then be too loose and the spreader would no longer be working. The mast would bend violently to leeward as the overlong cap shroud is over stressed. This is why the spreader tip needs to be tied to the cap shroud, that way it won't fall out of place, even when slack.

The second reason really slack shrouds are a danger is made apparent during tacking and especially during jibing. The slack rigging is under no tension while on the leeward side. Should your yacht undergo an accidental jibe, the leeward shrouds would quickly become the windward shrouds in a violent display of force.

The slack shrouds will be shock loaded, and these shock loads can be tremendously greater than what the stay is able to withstand. An accidental jibe could actually snap a stay, which results in overloading the remaining stays and potentially bringing down the mast.

If the leeward shrouds are kept in slight tension, they will not go from slack to fully loaded in an instant and the rigging will have a better chance of surviving a fierce accidental jibe.
Tagged: Stays, Synthetic Standing Rigging

found this on the net, hope it helps, cheers
Regards Peter T
" Sail-La-Vie," # 114


"Believe me, my young friend, there is nothing - absolutely nothing - half so much worth doing as simply messing about in boats."
Dreamweaver
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Joined: Sat Nov 13, 2021 7:48 am
Investigator Boat Name: Dream Weaver

Re: Boom hits back stay when running.

Post by Dreamweaver »

Cheers Pete.
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