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Catalina/Capri 25/250 Sailor's Forums

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Boom Vang

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jerlim
Master Marine Consultant

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USA
1484 Posts

Response Posted - 11/01/2007 : 13:08:30

Looking at photos of the 250 and larger craft, the angle seems to be 45 deg.

Edited by - on

DaveR
Master Marine Consultant

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USA
2015 Posts

Response Posted - 11/01/2007 : 14:17:46

Hi Larry,
If no one gets to it first I'll go down to the boat tomorrow at 1pm and measure the distance from the mast to the mast hound and then also from the mast step eye to the mast hound and get back to you.

Edited by - on

Frank Hopper
Past Commodore

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Pitcairn Island
6776 Posts

Response Posted - 11/01/2007 : 14:33:34

Edited by - on

piseas
Former Treasurer

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USA
2017 Posts

Response Posted - 11/01/2007 : 16:21:30

Frank, not related but very nice pic.
Steve

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Dave Bristle
Master Marine Consultant

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Djibouti
10005 Posts

Response Posted - 11/01/2007 : 16:42:07

<blockquote id="quote">quote:<hr height="1" noshade id="quote">Originally posted by piseas
 Frank, not related but very nice pic.<hr height="1" noshade id="quote"></blockquote id="quote">It shows his 45-degree vang, and nicely. (Maybe the sun glare blinded you.)

Edited by - on

GaryB
Master Marine Consultant

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USA
4304 Posts

Response Posted - 11/01/2007 : 19:35:02

Dave,

Are you sure it's going to be at 1:00PM? :)

GaryB
'89 SR/WK # 5862
Kemah,TX

Edited by - on

OLarryR
Master Marine Consultant

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USA
3466 Posts

Response Posted - 11/01/2007 : 21:33:28

Thanks guys ! 45 degrees sounds like a good number and unless Frank's photo is an optical illusion...it looks about 45 degrees. Even better is the 1pm visit to the boat for actual dimensions ! Can't ask for better than that !

Latest on the sail purchase...I was just about to order the sails from Quantum but became too busy at work and so did not make the phone call. I had requested a quote from Doyle but their quote form indicated it could take a week which ended yesterday with no response. I went sailing for awhile today and now at home, I see I received an EMail from Doyle. They want to talk. So...that may happen tomorrow. They and North are the ones with their own proprietary Dacron matls and so it's hard to get a comparison of their weave and comparison to the Challenge sail matl that most sailmakers offer in one of their 4 Dacron grades. Their website does not have that detail...and so that is one question i am curious for them to answer. Hope to wrap this up soon and make the sail purchase. keep you posted on that.

Edited by - on

DaveR
Master Marine Consultant

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USA
2015 Posts

Response Posted - 11/02/2007 : 07:37:29

hahahaha, It's lunch time. Actually I'll be "outtahere" about 10 till if you must know

(my whole life is on a schedule)

Edited by - DaveR on 11/02/2007 07:38:29

dlucier
Master Marine Consultant

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Virgin Islands (United Kingdom)
7583 Posts

Response Posted - 11/02/2007 : 08:05:40

Larry,

You might want to confirm this with a professional rigger, but I seem to remember, and don't hold me to this, that the vang angle should be no greater than 45 degrees (measurement at the boom end) and no less than 30.

Edited by - on

Frank Hopper
Past Commodore

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Pitcairn Island
6776 Posts

Response Posted - 11/02/2007 : 10:48:27

I think Don is right, I have seen them within those angles but never outside of those angles. I could even imagine that less than 45 would help on an adjustable boom, it would drive into the mast and put less stress on whatever keeps the boom from sliding.

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OLarryR
Master Marine Consultant

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USA
3466 Posts

Response Posted - 11/02/2007 : 11:26:19

I would think that the smaller the angle...well let's say you exaggerate it to a real small angle...then the boom would tend to lift a bit. It would be harder for the boom vang to hold it down. It would become more dependent on the stretch of the lines. probably between 30-45 degrees is okay. In any case, some of you apparently have used 45 degrees and it was okay. Let's see what Dave's 1pm inspection turns up and may be I will try and search some more on the web. Somewhere they must have that info.

Edited by - on

DaveR
Master Marine Consultant

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USA
2015 Posts

Response Posted - 11/02/2007 : 14:17:58

I agree also a little less than 45 degrees might even be better. But mine measures 51" from the mast step eye to the masthound eye and 37" from the mast end boom cap edge to the masthound eye.

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OLarryR
Master Marine Consultant

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USA
3466 Posts

Response Posted - 11/03/2007 : 08:49:51

Dave,

Thanks for checking ! So...yours is in the neighborhood of 45 degrees (~46 degrees ?)...and more importantly ...it works !

I did some addl searching on the web this morning and came up with this info for an "A-Vang"...

"F. Check the orientation of the vang for best use by positioning
vang about 1/3 of boom length from gooseneck and positioning
vang angle with boom about 25 to 40 degrees.
G. Check boom swing for potential contact with hatches,
dorades, etc. "

Edited by - on

dmpilc
Master Marine Consultant

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USA
4593 Posts

Response Posted - 11/03/2007 : 09:57:31

Start with: Approximately the same distance as from the boom to the base of the mast when the main is raised full up. If there are any other C-25's available to you, measure their vang position. I'm going to my boat this afternoon. I'll try to remember to measure it for you.

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OLarryR
Master Marine Consultant

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USA
3466 Posts

Response Posted - 11/03/2007 : 14:45:37

Thanks David !

Same length as boom to base would then make it 45 degrees. If length from mast along the boom is a bit longer than boom to base...then we are talking working our way toward 30 degrees or so. (My tall rig has the boom fixed to the mast...so the boom to base remains a constant length...but you are right as far as others that are contemplating installing a vang and can lower and raise the boom along the mast.)

Edited by - on

OLarryR
Master Marine Consultant

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USA
3466 Posts

Response Posted - 11/03/2007 : 14:51:21

By the way...fast deliver from Catalina Direct ! I now have the masthound. Only thing is that the enclosed paperwork indicates Catalina 22. I rechecked the website and they offer only one masthound. It's description indicates it is good for both the Catalina 22 and 25.

It was windy today so...I only went down to the boat to take measurements finishing up the supports for the bunk extension I am wroking on. I should complete it this winter. Tomorrow, the winds should be 5-10knts and I hope to go sailing. I will take the masthound with me and see how it matches up with the boom diameter.

No instructions were given with the masthound. I was going to use screws but was also thinking of maybe using blind rivets. Maybe I should just go with screws, the rivets may pull out. Any thoughts ?

Edited by - on

dmpilc
Master Marine Consultant

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USA
4593 Posts

Response Posted - 11/04/2007 : 16:52:29

I went to our boat this afternoon and, while there, measured how far down the boom my masthound sits. On our tall rig, the eye of the masthound is 36" from the gooseneck (the fitting on the end of the boom that attaches it to the mast. Pop rivets should work fine. So would screws. If you have an internal outhaul, use pop rivets. Just make sure that you match the drill bit to the screw or pop rivet size. Hope that helps.

Edited by - dmpilc on 11/04/2007 17:00:49

OLarryR
Master Marine Consultant

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USA
3466 Posts

Response Posted - 11/04/2007 : 21:27:37

David - Thanks for the dimensions. You had 36" and Dave indicated he had 37".

I slip fitted the masthound on the boom today - Sometime this week I hope to drill the holes, install screws and attach the vang.

Edited by - on

OLarryR
Master Marine Consultant

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USA
3466 Posts

Response Posted - 11/06/2007 : 18:27:09

Update: Masthound fitting installed ! I am not paying the $20/month for electric service and so I was wondering if my rechargeable Dremel would have enough power to drill the 6 holes - but it had no problem.

Interesting thing about the dimensions provided - thanks to all ! But I failed to realize beforehand that those dimensions must be for std rigs. No way did I have 36" or so from the boom to the cabin top ! I had a measly 22" !

So....with all that info and here I am with a Dremel and no calculator to figure out what dimension along the boom would yield approximately 30 degrees. 45 degrees - easy enough ...it would be 22". So...I eyeballed it and took a conservative angle less than 45 degrees but greater than 30 degrees. The boom dimension from the masthound eye to a point on the boom directly above the mast tang where the vang would attach is 30". This works out to be approximately 36 degrees. I guess I could have gone further along the boom but believe this will do fine.

I only had time to attach the masthead fitting (basically a 1/2 hour job. Next time down to the boat, hope to attach the vang and then go sailing to see how it works out.

Edited by - on

dmpilc
Master Marine Consultant

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USA
4593 Posts

Response Posted - 11/06/2007 : 19:25:11

You should be fine. The 45 degree angle in my earlier comment was a guess looking at Frank's picture and trying to visualize, after a few beers,

the boom vangs on my C-22 and the C-25. The 36" number I gave you was the actual measurement on my tall rig C-25 from the end of the boom at the mast to the eye on the fitting on the boom to which the vang attaches. If your measurement is 30", you'll be okay.

Edited by - dmpilc on 11/06/2007 19:31:50

Stardog
Captain

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USA
319 Posts

Response Posted - 06/03/2008 : 14:22:23

Hi Larry,

Just wondering if you got your boom vang installed yet? I'm going down to the marina later and can measure the location of the bail on the boom, if you like.

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OLarryR
Master Marine Consultant

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USA
3466 Posts

Response Posted - 06/03/2008 : 19:10:25

Thanks for the offer ! I finished the boom vang months ago. I wanted it done before I hooked up the new sails and I keep my boat in the water all year-round, so I am either sailing when the weather warms up a bit or I'm working on a project. So...this was one of the easier and less time consuming improvements.

The boom vang works fine ! I used screws and they went in okay. It is a firm mount.

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dmpilc
Master Marine Consultant

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USA
4593 Posts

Response Posted - 06/03/2008 : 21:44:46

you want about a 45 drgree angle for the vang. checkout other boats at your marina.

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OLarryR
Master Marine Consultant

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USA
3466 Posts

Response Posted - 06/04/2008 : 05:28:30

What was neat about this project was that in snooping in the storage areas of my boat, I found what appeared to be an unused main sheet setup with the blocks, lines, etc. I did not immediately pay too much attention to it when I saw it in a plastic bag under one of the seat storage areas. Then going back to it one day, I took it out to look it over some more and see how it compared to the existing main sheet setup. That's when I then noticed it was a Ronstan boom vang. I suspect that the PO or the PO before him had come by it or purchased it and then either did not realize there was no masthound to connect it to or just never got around to installing a masthound. So...once I installed the masthound...I just hooked up the boom vang a few days later. It's a done deal !

Checking in West Marine, I remember checking to see how much these boom vangs cost and then realized that this boom vang that appeared never to have been used laying in that bag in the storage area was worth about $200+ . maybe I should go and see if there any other nooks and crannies in the boat that I have not checked out yet...I could use some new halyards ! An electric water faucet would be nice ! I doubt i would find a Tilley hat my size hiding somewhere ? I'll discuss that in another posting.

Thanks to all that assisted with the placement of the masthound !

Edited by - OLarryR on 06/04/2008 05:29:46

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