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 Post subject: Re: Mast collar slipped
PostPosted: Mon May 03, 2010 3:05 pm 
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Location: Oceanside, California
ron34422 wrote:
Would it be possible to use a stainless rivet with the epoxy to hold the drum to the mast?...


We don't use a rivit due to potential cracking issues.

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Matt Miller
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 Post subject: Re: Mast collar slipped
PostPosted: Mon May 03, 2010 4:46 pm 
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Joined: Wed Dec 19, 2007 4:07 am
Posts: 598
Location: Punta Gorda, FL
I was wondering about that too when I saw the rivet in the mast base fitting. That one is not under any load, though. Makes sense, thanks Matt!

Writeup on my furler drum regluing job.


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 Post subject: Re: Mast collar slipped
PostPosted: Thu Jun 24, 2010 8:54 pm 
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Joined: Wed Dec 19, 2007 4:07 am
Posts: 598
Location: Punta Gorda, FL
I put my repair to a good test today, and it works fine!

Image

Got some good video too!



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 Post subject: Re: Mast collar slipped
PostPosted: Sat Sep 04, 2010 3:47 pm 
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Joined: Thu Feb 04, 2010 7:48 pm
Posts: 2
I have had it happen three times now.
I have two Adventure Islands and the first time I fixed it using Sikaflex and that failed pretty quickly.
The second time I sent them back to the dealer and they did it with epoxy.
Yesterday I went out in quite gusty conditions but with the rig reefed way way down to the point it was quite slow.
When I got back the drum had moved again on the mast.
It seems to me that the problem is probably caused by the mast flexing and the downhaul working the drum up.

So should you have no downhaul on in windy gusty conditions? ie the bare minimum and or could you put some shock cord into the system to stop the heavy loading up on the drum?

Otherwise my other thought is that the gluing of carbon fibre to plastic with epoxy is always going to give you trouble.

My other option is to get a bloke I know to turn me up a wooden drum on his lathe that fits the same, drill some holes in it to allow the epoxy to bite onto something and try again. Wood would glue really well to carbon fibre in my opinion if the surface was scored in a small way...

Has anyone tried this?
Otherwise may try the stainless collar idea.

Rob Blackburn
Lennox Head
Oz


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 Post subject: Re: Mast collar slipped
PostPosted: Sun Sep 05, 2010 5:11 am 
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Joined: Thu Aug 16, 2007 2:25 pm
Posts: 1966
Location: Central Coast NSW Australia
Rob,
If the repair is done properly and with the right epoxy it should hold OK. My dealer used Spabond and I have had no problems since the initial repair. I'd be going back to my dealer and insisting they prep it right and use a suitable epoxy. :)


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 Post subject: Re: Mast collar slipped
PostPosted: Sun Sep 05, 2010 5:20 am 
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Joined: Tue Aug 18, 2009 2:07 pm
Posts: 331
Location: Saint Johns, Florida
roboflennox wrote:
So should you have no downhaul on in windy gusty conditions? ie the bare minimum and or could you put some shock cord into the system to stop the heavy loading up on the drum?
Oz

Rob,

Normaly the downhaul should be tight when the wind is strong and looser when the wind is light. This is to control the shape of the sail. The way the AI & TI is designed the tension on the downhaul doesn't have much or any effect on sail shape so I just keep mine tight.

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Jerry D.
St. Johns, Florida
2010 TI
2008 AI


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 Post subject: Re: Mast collar slipped
PostPosted: Thu Sep 16, 2010 2:06 pm 
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Joined: Thu Mar 27, 2008 1:20 pm
Posts: 9
Location: Chicago,IL.
Not only did my mast collar come loose like all of yours, but the lower edge that the metal clip clips to broke a piece of the plastic off, so now I have to order a new mast collar. Luck for me I own another sailboat I can use till I can get around to ordering the new mast collar. My sailing season is getting shorter by the day. I sail on the southern end of Lake Michigan, where I live, and up in Canada on Lake-In-The-Woods, ON.


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 Post subject: Re: Mast collar slipped
PostPosted: Thu Sep 16, 2010 3:23 pm 
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Joined: Tue May 27, 2003 12:44 pm
Posts: 8966
Location: Oceanside, California
You should not be purchasing a new drum. This is covered by warranty. See a dealer to get another fitted at no charge to you.

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Matt Miller
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Hobie Cat USA


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 Post subject: Re: Mast collar slipped
PostPosted: Sun Jan 02, 2011 9:20 pm 
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Joined: Thu Feb 04, 2010 7:48 pm
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I'm back with the same problem again.

To recap...
Dealer fixed it with epoxy after my repair failed. I put the Stainless hose clamp around mast and it still moved.

Disassembled today and found the epoxy used in the repair had sort of gone soft/spongy.

I am now considering a 3/16 inch stainless bolt right through the collar and mast to stop it happening again.. along with new epoxy.

I was thinking you could take the bottom fitting off, insert up a turned wooden plug to fit the inside of the mast to the top of the drum, and bolt through that?

Or is this likely to cause some other failure.

I am just concerned that if it comes off again, the mast rides up and it comes off the locator pin on the boat and then snaps. Then it is a long pedal home.

Any clues or was the epoxy just hopeless again?

Cheers

Rob


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 Post subject: Re: Mast collar slipped
PostPosted: Mon Jan 03, 2011 10:19 am 
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Joined: Fri Jan 05, 2007 9:21 pm
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Location: Maui, Hawaii
Email Matt Miller to know what the proper epoxy to use, (maybe he or your dealer can even send you some). Any extra holes in the mast will only weaken it. I've done this repair on 2 AI's, and with the correct epoxy, it should never slip again.

I check all my masts, and any that came in with any gap between the spool and the mast (top or bottom) I epoxied like a caulking between them also.

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http://KayakingBob.com - - - - - Hobie Island Sailing since 2006 - - - - - 2011 & 2012 Hobie AIs and a 2012 TI


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 Post subject: Re: Mast collar slipped
PostPosted: Mon Jan 03, 2011 1:08 pm 
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Joined: Tue May 27, 2003 12:44 pm
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Location: Oceanside, California
Properly glued... this should not be an issue. Remove, sand off all excess material and glue using a quality 2 part epoxy. I am unable to get an answer at the moment as to what epoxy is currently being used in our factory. I'll keep trying.

Tom Ray's repair instructions say West System.

http://www.tropicalboating.com/boat-repairs/adventure-island-furling-drum-epoxy-repair.html

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Matt Miller
Director of Parts and Accessory Sales
Hobie Cat USA


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 Post subject: Re: Mast collar slipped
PostPosted: Tue Jan 04, 2011 12:50 am 
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Joined: Wed Dec 19, 2007 4:07 am
Posts: 598
Location: Punta Gorda, FL
Yes, I went with West Systems epoxy because it was what I had on hand and because it has always worked well for me.

So far, so good on my mast repair, but I have not really sailed the boat in a lot of wind many times since the repair. The furler drum joint is not under a lot of pressure unless you are sailing reefed in strong winds and/or furling/unfurling the sail many times in strong winds.

Since my repair, I have mostly sailed in moderate winds, and the only stress on the furler comes at the end when I roll the sail up, and that is not much stress.

I am fairly confident the repair is good, and many wooden boat builders testify to the quality of West epoxy, but at this point I would have to say my repair is not yet fully tested.


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 Post subject: Re: Mast collar slipped
PostPosted: Tue Jan 04, 2011 9:21 am 
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Location: Oceanside, California
Confirmed... we are using West System G/Flex.

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Director of Parts and Accessory Sales
Hobie Cat USA


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