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Rigging preventers for downwind sailing

I'd like to rig preventer lines to the boom for downwind sailing on my PS34. Recently, I sailed aboard a Clipper 60 and noted how the preventers were set up on it. After I snapped these photos, we changed the configuration to run the preventer line in use back to a winch on the leeward side of the cockpit since all the winches on the windward side were in use for the yankee and staysail sheets. As shown in the photos, the boat had a lot of deck mounted turning blocks and fairleads for the preventer lines.

Anyone on a PS34 or 37 have a similar set up?
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Re: Rigging preventers for downwind sailing

I have two preventer lines which go through a snatch block at the base of the shrouds to primary or spinnaker winches.. whichever is unused.
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Re: Rigging preventers for downwind sailing

Hey kbbarton: This is not my original idea: Since the coach roof traveler on Our PS34 works pretty much like a vang, I use the vang as a preventer when running off the wind. I make a sail tie into a loop and use it to fasten the vang on the leeward midship cleat. The bottom block on the vang is attached to the mast plate with a snap shackle which makes it easy to set up.

regards charlie
s/v Windrunner
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Re: Rigging preventers for downwind sailing

I mixed up my windward and leeward sides in my post above... whoops!
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Re: Rigging preventers for downwind sailing

I've always run my preventers from the end of the boom, outside everything and through a chock forward to a bow cleat. Since I rarely run a prevented for less than several and more likely for days, I don't find the need to get all complex with snatch blocks and winches. Just a simple line usually bowlined to the end of the boom with chafe gear at the chock.

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Re: Rigging preventers for downwind sailing

Quote:
Originally Posted by SanderO View Post
I have two preventer lines which go through a snatch block at the base of the shrouds to primary or spinnaker winches.. whichever is unused.
Quote:
Originally Posted by [email protected] View Post
Hey kbbarton: This is not my original idea: Since the coach roof traveler on Our PS34 works pretty much like a vang, I use the vang as a preventer when running off the wind. I make a sail tie into a loop and use it to fasten the vang on the leeward midship cleat. The bottom block on the vang is attached to the mast plate with a snap shackle which makes it easy to set up.

regards charlie
s/v Windrunner
Neither of these sound like a good idea. When you rig a preventer essentially vertically, you risk damaging the boom and/or goosneck if the end of the boom hits the water or gets hit by a wave. Having been aboard when that happens, I am amazed at how much damage can be done when that happens (as in tearing out a piece of the aft face of the mast).

Those pictures represent the currently recommended practice of having a low stretch line that attaches to the clew end of the boom, which has an eye in the forward end and is temporarily held to the side of the boom by a piece of shock chord that terminates at the tack end of the boom. A separate preventer line is run from the cockpit winches forward to a block on the foredeck, outboard of the shrouds to the eye on the permanent part of the preventer that stows on the boom. When in use that line is tensioned from the cockpit (in my case run to dedicated stoppers run to the cabintop winches.)

Typically, there are duplicate preventer lines on both sides of the boat, so the preventers can be jibed without having to be rigged and unrigged, but are merely trimmed from the cockpit. This set up allows the boom to be eased under load to the centerline of the boat in the case of an accidental jibe or a death roll.

As far as the line to use for the preventers, I prefer to use something with some stretch (nylon) so that the boom does not experience a shock loading. But others have made a good case that a lower stretch line (dacron) may be a better choice.

Jeff
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Re: Rigging preventers for downwind sailing

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Originally Posted by Jeff_H View Post
Neither of these sound like a good idea. When you rig a preventer essentially vertically, you risk damaging the boom and/or goosneck if the end of the boom hits the water or gets hit by a wave. Having been aboard when that happens, I am amazed at how much damage can be done when that happens (as in tearing out a piece of the aft face of the mast).

Those pictures represent the currently recommended practice of having a low stretch line that attaches to the clew end of the boom, which has an eye in the forward end and is temporarily held to the side of the boom by a piece of shock chord that terminates at the tack end of the boom. A separate preventer line is run from the cockpit winches forward to a block on the foredeck, outboard of the shrouds to the eye on the permanent part of the preventer that stows on the boom. When in use that line is tensioned from the cockpit (in my case run to dedicated stoppers run to the cabintop winches.)

Typically, there are duplicate preventer lines on both sides of the boat, so the preventers can be jibed without having to be rigged and unrigged, but are merely trimmed from the cockpit. This set up allows the boom to be eased under load to the centerline of the boat in the case of an accidental jibe or a death roll.

As far as the line to use for the preventers, I prefer to use something with some stretch (nylon) so that the boom does not experience a shock loading. But others have made a good case that a lower stretch line (dacron) may be a better choice.

Jeff
YES I use two preventers port and starboard... low stretch is not important... and may be counter productive. My boom never gets to be perpendicular to the CL because my spreaders and rigger being swept back prevent that. Further, the high free board keeps the boom end above the water. When it's reefed down there is even less of a chance of scooping water. Maybe I have been lucky... but my preventers have worked.

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Re: Rigging preventers for downwind sailing

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Originally Posted by SanderO View Post
YES I use two preventers port and starboard... low stretch is not important... and may be counter productive. My boom never gets to be perpendicular to the CL because my spreaders and rigger being swept back prevent that. Further, the high free board keeps the boom end above the water. When it's reefed down there is even less of a chance of scooping water. Maybe I have been lucky... but my preventers have worked.
Maybe I should have added, 'Your mileage may vary'.

Jeff


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Re: Rigging preventers for downwind sailing

Our preventer is run as our Vang , two sets of blocks one attached to the toenail when running downwind / or wing on wing . The one end attached to the boom, the other to the perforated anodized toe rail. It’s main purpose for us is to prevent the main from unexpectedly gybing.


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Re: Rigging preventers for downwind sailing

gybe preventer... don't sail dead down wind and never by the lee.

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