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Boom set - any ideas?

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Headhunter
1st Mate

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74 Posts

Initially Posted - 06/12/2003 : 09:42:42

Having some new sails made. My sailmaker suggests that the sail will/would be much more efficient if I set the boom. With my tall rig, he suggests that the top of the boom should be 28'1" down from full hoist on the mast. My question is, what would be the best way to bolt the gooseneck into the mast slot?

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ClamBeach
Master Marine Consultant

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3072 Posts

Response Posted - 06/12/2003 : 10:15:55

Why does he think it would be more effecient?
Some folks go to a lot of trouble to get a sliding gooseneck.

The sliding gooseneck allows you to set the boom at whatever position you choose. Make a mark on the mast 28'-1" down from the top and set the boom there with track stops and/or cunningham.

Currently maintaining two holes in the water...'77 Venture 23 and new to the family,
'78 Catalina 25

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Headhunter
1st Mate

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Response Posted - 06/12/2003 : 11:33:04

As I recall from race weeks at Key West, Tampa, Charleston, etc. it seems that most of the true racers - the Mumms the Melgeses, etc. had/have fixed booms.

This sailmaker makes sails for a lot of the NCYA, SCYA, SAYRA, and Key West Race Week winners. He supposedly knows how to make a boat go fast, which is what I am looking for.

Do you think that the desireability of the sliding gooseneck is because of it efficiency or more because it's nice to be able to raise the boom to get it out of the way for dining, etc.? Other opinions? This warrants some research.

I am intrigued by the idea of a "cunningham" to pull the boom down to the desired level, but would think, and I was wrong that one other time, that downhaul tension directly on the boom would affect other aspects of sail shape than just the luff tension. A properly attached cunningham puts no pressure on the boom itself.

Doug Riley
"Life o' Riley"
5231 '86 TM FK
Lake Norman, NC

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dlucier
Master Marine Consultant

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Virgin Islands (United Kingdom)
7583 Posts

Response Posted - 06/12/2003 : 11:47:31

<BLOCKQUOTE id=quote>quote:<hr height=1 noshade id=quote>I am intrigued by the idea of a "cunningham" to pull the boom down to the desired level, but would think...that downhaul tension directly on the boom would affect other aspects of sail shape than just the luff tension. <hr height=1 noshade id=quote></BLOCKQUOTE id=quote>

The cunningham doesn't exert any forces on the boom, only on the luff of the sail.

As for fixing the boom to the mast, as Bruce stated, sail track stops can be used to fix the boom at a certain location on the mast. I have a slide stop both above and below the gooseneck to keep it pretty much in one spot on the mast.

<img src="http://www.sailnet.com/store/prodimage/160x160/dav2350.gif" border=0>

<img src="http://www.catalina25-250.org/c25sm.gif" border=0>Don Lucier<img src="http://www.catalina25-250.org/c25sm.gif" border=0>
<img src="http://im1.shutterfly.com/procserv/47b2d904b3127cce9f7cd9ffdf1d0000003010" border=0>
North Star SR/FK

Edited by - dlucier on 06/12/2003 11:54:00

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Headhunter
1st Mate

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74 Posts

Response Posted - 06/12/2003 : 11:52:29

Is this a track stop similat to the pop-top holder in the lower part of the mast slot? You've probably got something a bit stronger than that, right?

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dlucier
Master Marine Consultant

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Virgin Islands (United Kingdom)
7583 Posts

Response Posted - 06/12/2003 : 12:00:43

<img src="http://www.sailnet.com/store/prodimage/160x160/dav2350.gif" border=0>

I use two of these to hold the gooseneck in place. My boom is positioned so when the main is at maximum hoist and with no cunningham tension, the luff is rather loose(for sailing in light air). When the wind freshens up, I tension the cunningham to tighten the luff and trim the main.

<img src="http://www.catalina25-250.org/c25sm.gif" border=0>Don Lucier<img src="http://www.catalina25-250.org/c25sm.gif" border=0>
<img src="http://im1.shutterfly.com/procserv/47b2d904b3127cce9f7cd9ffdf1d0000003010" border=0>
North Star SR/FK

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Headhunter
1st Mate

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74 Posts

Response Posted - 06/12/2003 : 13:46:57

Where do you get those? Catalina Direct?

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dlucier
Master Marine Consultant

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Virgin Islands (United Kingdom)
7583 Posts

Response Posted - 06/12/2003 : 14:42:06

<BLOCKQUOTE id=quote>quote:<hr height=1 noshade id=quote>Where do you get those? Catalina Direct?<hr height=1 noshade id=quote></BLOCKQUOTE id=quote>

Yes, Catalina Direct has them($7.95ea plus shipping). You can also get them from SailNet($5.95ea and no shipping).

http://www.sailnet.com/store/item.cfm?pid=20087

<img src="http://www.catalina25-250.org/c25sm.gif" border=0>Don Lucier<img src="http://www.catalina25-250.org/c25sm.gif" border=0>
<img src="http://im1.shutterfly.com/procserv/47b2d904b3127cce9f7cd9ffdf1d0000003010" border=0>
North Star SR/FK

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Headhunter
1st Mate

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74 Posts

Response Posted - 06/12/2003 : 14:54:43

Thanks, Don...You da man.

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Buzz Maring
Master Marine Consultant

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USA
1772 Posts

Response Posted - 06/12/2003 : 15:04:52

Yes, Catalina Direct has them($7.95ea plus shipping). You can also get them from SailNet($5.95ea and no shipping). - Don

Thanks, Don ... I need them, too. I already ordered them from SailNet. Unfortunately, they are on backorder ... 'no big deal though ... I'll get by with the Mickey Mouse crap that's in the track for now.

Buzz Maring
<img src="http://im1.shutterfly.com/procserv/47b3df23b3127cce9306a9b3abad0000001010" border=0>
~~Freya~~
C-25 SK/SR #68

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luckystar
Navigator

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USA
236 Posts

Response Posted - 06/12/2003 : 20:04:12

Okay, so what's the approx. height of a boom on a standard rig need to be? I've often wanted to put a black stripe like I''ve seen on the racers boats so that I can be a little more consistant and make sure that my downhaul on the boom is set right. If anyone has the measurement, i'd sure appreciate it.

I got tired of my boom sliding all the way down and after I bought Joe Martinek's slide gate covers, I used the same same sail track stop under the boom about three inches lower than my down haul length. That with the topping lift set so that when hoisted it's slack and when not it's still up (not head bonking when I've forgotten to set it before releasing the halyard! Doh!)

But I'd still like to know where it needs to be. And speaking of that, how close should the main sail luff be to the masthead. I've never really had troubles by pulling it up all the way, setting the downhaul to chosen tension, but I'm just curious. Now that I'm getting addicted to Racing, I really want to tweak the hell out of Lucky Star!!

Patrick Burnett, Little Rock, AR
S/V Lucky Star #2707 1982 SK/SR 
<img src="http://www.proxycreative.com/clients/luckystar/luckystar_0602_sm.jpg" border=0> 
http://www.proxycreative.com/luckystar.html

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SEA DOG
Deckhand

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USA
19 Posts

Response Posted - 06/12/2003 : 20:31:17

A SS self tapping panhead screw in the mast track.

Seadog FK/TR 4232

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