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post #1 of 9 Old 09-26-2013 Thread Starter
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Double vang? Rigging question from a beginner

I was at the docks ogling boats and I saw one that looked particularly stunning so I walked over for a closer look. It's a gorgeous boat, well cared for. I was told it's a Valiant 40 (I don't know boats well enough to identify it myself).

Anyway, it has some rigging that confuses me. It looks like twin vangs connected to the genoa car track. That's probably not it at all, but I'm hoping someone could explain the function of this rig. What the heck is this?

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post #2 of 9 Old 09-26-2013
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Re: Double vang? Rigging question from a beginner

I'm guessing that is a boom preventer setup. Keeps the boom from accidentally swinging across the cockpit.
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post #3 of 9 Old 09-26-2013
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Re: Double vang? Rigging question from a beginner

Those are preventers, used to prevent an accidental jibe when going downwind or wing and wing.

It's more common to see those and a vang rigged. I guess you could use those as a vang only, but you'd have to adjust it on every tack or jibe which would be really annoying.

Another common setup is to have the vang setup with a snap shackle. Then you can unclip it from the mast and clip it to a track to act as a preventer.

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Re: Double vang? Rigging question from a beginner

Yes vang/ preventer, they are clipped to the staysail tracks to keep the side decks clear at dock side and sailing at higher angles. They would be moved to the rail more off the wind.
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Re: Double vang? Rigging question from a beginner

OK, got it. The only preventers I've seen (again, beginner here) have been run forward and not used blocks.

So does this boat not have a boom vang? Or would cranking down on the preventer serve the same function?
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Re: Double vang? Rigging question from a beginner

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Originally Posted by ctl411 View Post
Yes vang/ preventer, they are clipped to the staysail tracks to keep the side decks clear at dock side and sailing at higher angles. They would be moved to the rail more off the wind.
I should hit refresh before I post... So this boat wouldn't need a traditional boom vang run to the mast, because these preventers would hold the boom down. That makes sense.
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Re: Double vang? Rigging question from a beginner

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Another common setup is to have the vang setup with a snap shackle. Then you can unclip it from the mast and clip it to a track to act as a preventer.
I hope this is not a hijack to the OP....Alex, can you explain a bit more how this set up would be rigged? Is this just a line running from the boom where the vang is? I've been looking at different preventer setups and trying to decide what's best.


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post #8 of 9 Old 09-26-2013
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Re: Double vang? Rigging question from a beginner

IMO these are too far inboard to be used as a preventer. As mentioned above a preventer is usually run from the boom end forward as a single line.
I have a very similar system, though with just one block and tackle which I use as a vang, but when tacking I must move the end on deck (on the genny track) to the other side.
This appears to be a vang system that can be handled from the cockpit without the jam cleat at the deck block that my system uses.
I'm not too sure that it wouldn't be a bit more versatile if the deck ends were to the genny track, rather than the staysail track (farther outboard) but it certainly wouldn't be as neat. Pretty nifty though.

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Re: Double vang? Rigging question from a beginner

Boom preventer / vang. it has snap shackles so it can be move to the rail but would work from the jib track. on Valiant 40 the genoa/ foresail track is way aft and would not work for the preventer . it is a cutter rig so most likely no genoa

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