Boom Plate/Gooseneck Separation

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JAS
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Boom Plate/Gooseneck Separation

I was out sailing in about 20 knot winds just outside of San Diego Bay, when suddenly my boom separated from my mast at the gooseneck and the boom end casting/plate. The only thing holding up my boom was now the sail, which was already starting to show the stress of the high winds where the sail slides into the boom. I literally thought the sail was going to tear at any momement, bringing the whole rig down.

I immediately headed directly into the wind, and lashed my boom to the mast to keep her elevated, and then lowered my sail. My four guests and children had no idea what was going on until I told them upon our return to the marina (I can't believe nobody caught on)!

At any rate, I was convinced that I was going to have to get a rigger and spend thousands of dollars to repair the damage/re-attach the boom. As it turns out, I was able to re-attach the boom to the mast myself, and for a couple of bucks no less (the cost of a bag of three cotter pins)!

All I did was loosen the outhaul, unscrew the black boom end plate, use a chisel and hammer to pop it out of the boom, fish out the washer that was held in by the old cotter pin that sheared off, push the pin back through the boom plate, put the washer back on (there is a washer at both ends, inside and outside the boom plate), put the cotter pin back in to hold the washer in place on the inside, re-insert the boom plate, screw it back in to the boom, and voila!...I was ready to go sailing again. It was literally that easy!

Thought I'd go out of my way to share my story, as this is bound to happen to someone else. That cotter pin assembly is quite flimsy when you consider the forces pulling and torquing on it.

All the best--Joel S.

Joel Schwartz
s/v Get-A-Grip
1993 Catalina 36 Hull #1259
Newport Beach, California

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deising
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Thanks for sharing that Joel. It certainly could have been much worse for you and your guests. Glad you could get it fixed so easily.

Duane Ising - Past Commodore (2011-2012)
s/v Diva Di
1999 Catalina 36 Hull #1777
Std rig; wing keel, M35B, Delta (45#)
Punta Gorda, FL
http://www.sailblogs.com/member/diva-di/

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JAS
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Posts: 258

PS I have since found out that Catalina recognizes the flimsy cotter pin assembly as a problem, and now sells an endplate with a fixed attachment. The current endplate is designed to let the boom twist on the gooseneck pin that sticks through the same. I'm not sure what that will do to sailing performance, but according to Catalina if you have a rigid boomvang the ability for the boom to twist doesn't matter. If this gets confirmed by someone who knows what they are talking about, the next time my boom separates from the mast due to the cotter pin shearing off (which, if you asked me, is only a matter of time now that I have seen how flimsy that cotter pin is compared to the forces that are brought to bear on it) I think I will consider replacing it with that new rigid pin plate from Catalina (under a hundred bucks at Catalina Direct). At the very least, I'm going to carry a few extra cotter pins just in case it happens again when I'm out cruising and I don't want to go back to port to get her fixed.

Joel Schwartz
s/v Get-A-Grip
1993 Catalina 36 Hull #1259
Newport Beach, California

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stu jackson c34
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Includes a photo discussion by Maine Sail

[url]http://c34.org/bbs/index.php/topic,7127.0.html[/url]

Stu Jackson, C34IA Secretary, C34 #224, 1986, SR/FK, M25 engine, Rocna 10 (22#)

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Wavelength
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Posts: 166

So the difference between the old style and new is a pin drilled through the casting and the SS gooseneck? If that is so why not drill the old casting and gooseneck and put a SS pin in? Simple project, you just need an extra long bit and a piece of 1/8 or 3/16 rod. Long drill bits ca be purchased from most industrial suppliers or ebay.

Ross & Joanne
Wavelength
Saint John NB
RKYC
C36 #658 TR 1987

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joshrosenheck
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Do you know of anybody who has done this? I need the new style non-rotating gooseneck to install my rigid boom vang so it doesn't put stress on the vang end fittings by rotating. The "new" style is $132 on Catalina direct but it seems like an easy enough DIY project. 

--
Josh Rosenheck
89 MK I / Hull #916 / Stg rig 
Marina del Rey, CA

alexanne
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Posts: 61

Seems to me that drilling and tapping the end of the goose neck shaft, a 1//4 -20 bolt and spacer should do, would eliminate the cotter key problem and still enable the boom to twist.

Alex H.
SV Alexanne, 1985 #432 SR
SF Marina Bay YH

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