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Catalina/Capri 25/250 Sailor's Forums

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Preventer Help

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familysailor
1st Mate

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USA
38 Posts

Initially Posted - 04/12/2005 : 16:39:57

I will be traveling to Lake Powell in a week and would like some help from those of you with more experience than me. How do you set up a preventer on your C-25s? I have heard reference to bungies but where do you connect them to the boom and where does the other end connect? How long a bungee to you need? What othere sorts of preventer setups are there? All sorts of questions and no answers.

Any help or suggestions will be appriciated. Thanks for all the wisdom you impart to those of us who are on the steep side of the learning curve.

Russ
Catalina 25 SK/SR #240 "Daydream"
Provo, Ut.

Edited by - on

PZell
Admiral

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USA
548 Posts

Response Posted - 04/12/2005 : 17:26:42

There are certainly more elegant methods, but this is what I have used in a pinch in light to moderate wind. Usually, this is just to keep the boom from slapping across the boat on me in lighter winds and rolly conditions. Just take one of your dock lines and toss it over the end of the boom, thread it thru the eye and draw up. Take the end forward to something on the same side of the boat as the boom and back to the cockpit. I have just threaded it thru the cabin top hand holds and back across to a cleat or winch where I can tie it off near the cockpit.

Edited by - on

Gloss
Master Marine Consultant

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USA
1916 Posts

Response Posted - 04/12/2005 : 18:23:02

Last year in the keys I was using a bungee as a preventer. I won't do that again. It stretched, snapped, and you know what happened next. I'll use rope from now on.

Edited by - on

JimB517
Past Commodore

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USA
3285 Posts

Response Posted - 04/12/2005 : 18:51:32

I have nice (and very simple) preventers. On each side of the boat I have a line looped around a stanchion base and tied with a rolling hitch (taut-line hitch). Its a sliding, adjustable knot. The other end of the line has a wichard shackle. You put the boom out, loosen the sliding knot, and shackle the end to the vang attachment point on the boom. Slide the adjustable knot till its tight. Done.

Ready to gybe?

One pull on the Wichard and it releases and off you go to the other side.

Clip on the other shackle and you are prevented.

I use them all the time, do not like a boom flopping around.

Do Not Use Bungees. The load is too great.

Edited by - on

JB007
Deckhand

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USA
20 Posts

Response Posted - 04/13/2005 : 01:19:45

Russ,

Be sure to let us hear about your Lake Powell excursion when you return!

Have they raised the lake's water level? Last I heard about Lake Powell is that the water level had dropped so drastically that people who slipped their boats at Bull Frog Marina had to hire a cab if they wanted to get to them.

Edited by - on

Brooke Willson
Admiral

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USA
983 Posts

Response Posted - 04/13/2005 : 06:35:20

I have a snap shackle on the lower end of my boom vang. I detach it from the bail on the mast and attach it to the base of a stanchion as a preventer. The snap shackle also lets me easily detach the vang when I want to raise and secure the pop top.

Brooke

Edited by - Brooke Willson on 04/13/2005 06:35:53

ddlyle
Captain

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302 Posts

Response Posted - 04/13/2005 : 08:15:04

Isn't the potential load too great for the stanchion base?

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dlucier
Master Marine Consultant

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Virgin Islands (United Kingdom)
7583 Posts

Response Posted - 04/13/2005 : 09:23:21

<blockquote id="quote">quote:<hr height="1" noshade id="quote">Originally posted by ddlyle
 Isn't the potential load too great for the stanchion base?
<hr height="1" noshade id="quote"></blockquote id="quote">

Not really...the preventer is just sitting there with no tension on it and even when the boom starts to gybe, there isn't that much force involved.

Additionally, the stanchions have 4 thru bolts on them which makes them quite robust.

Edited by - on

ilnadi
Captain

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452 Posts

Response Posted - 04/13/2005 : 09:48:41

Any thoughts on terminating he preventer at the stanchion base vs. genoa track?

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allencl
Navigator

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USA
143 Posts

Response Posted - 04/13/2005 : 11:38:55

I run a line from the aft end of the boom to a bow cleat. There's a lot less force on the line that way, and it's secured to a pretty strong point. I broke the snap shackle on the vang when using it as a preventer by running it to a stanchion base- won't do that again.

Edited by - on

PZell
Admiral

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USA
548 Posts

Response Posted - 04/13/2005 : 14:42:31

I've also used spare headsail blocks on the genoa track. That may be more
peace of mind than the stanchion. Also have detachable boom vang that I can use, but it's kind of a hassle crawling around on the cabin top sometimes, so just use the dock line over the boom thing if WX not too bad. Depends.

Edited by - on

Todd Frye
Navigator

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USA
222 Posts

Response Posted - 04/13/2005 : 15:51:51

Russ,
Ditto Brooke. I'd be happy to show you the vang preventer set up on Boaty. I've used it "surfing" on Utah Lake wing and wing...no problems. Also, I have some GPS waypoints and a map for Powell, if you’re interested. Be ready for plenty of motoring and take a camera. Uncle Bills is a "different/fun" place to get cleaned up after Powell.

http://www.canyon-country.com/unclebill/

Fair Winds. Todd Frye

Edited by - on

MattL
Admiral

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USA
990 Posts

Response Posted - 04/13/2005 : 15:59:58

I tried using a bungy last year, as stated above it was a disaster. The boom went up bent the hook out and shot right next to my son.
Think I'll try it agin the way Jim described. I have the big horn cleats for the jib sheets on my boat still, don't use them though. My thought is to go from boom to stanchion and end up on the cleat.

Edited by - on

familysailor
1st Mate

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USA
38 Posts

Response Posted - 04/13/2005 : 16:54:31

Thanks all for your comments. I knew by simply asking here that I would get the infomation I needed. I am sure the variable canyon winds will give me plenty of chances to try several methods.

John, the last time I was out at Bull Frog was late last season and a cab would not have done much good. You needed a dune buggy to get through the sand. I will let you know the results of the trip. It is the first time the C-25 has been down there.

Thanks again to you all!

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The Officers, Staff and members of this site only provide information based upon the concept that anyone utilizing this information does so at their own risk and holds harmless all contributors to this site.