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Old 04-10-2020, 15:15   #4531
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Re: Trimaran - Especially Searunner - Owners

Hi everyone, I just had a pleasant conversation with Dennis regarding the boat. I am a undecided if Iím up to the work involved with verifying the boatís integrity and preparing her for more than day sailing. But Dennis was very forthcoming. If at all curious get in touch with him!
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Old 11-10-2020, 23:12   #4532
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Re: Trimaran - Especially Searunner - Owners

Gluvit or Life Caulk on the aluminum struts of the Searunner 31? I couldn't find this info in the building guide.
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Old 12-10-2020, 06:37   #4533
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Re: Trimaran - Especially Searunner - Owners

AFAIK Gluvit is an epoxy, not really sure of the gluing properties with wood to metal. Something more flexible probably is a better way to go. Lifecaulk is useful if you're going to want to disassemble it anytime soon. 3M 5200 is even better as a bonder/sealant, but if you plan to take it apart anytime soon plan on a painful session with debonder and a putty knife. I prefer the quick cure version, it's a little more viscous and tends to stay where you put it instead of running all over.

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Old 12-10-2020, 07:59   #4534
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Re: Trimaran - Especially Searunner - Owners

Thanks! Tusitala.
The joint is bolted, aluminum to fiberglass over plywood, so I'm going to suppose whatever is in between probably serves as a sealant only, which suggests Life Caulk would be more appropriate.
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Old 12-10-2020, 12:18   #4535
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Thumbs up Re: Trimaran - Especially Searunner - Owners

Quote:
Originally Posted by snort View Post
Gluvit or Life Caulk on the aluminum struts of the Searunner 31? I couldn't find this info in the building guide.

Ahoy Snort

Been building SeaRunners since 1968, when I walked into Jim Brown's design studio in Davenport, California and bought the plans for my SeaRunner 25. I built that boat, then built a 37 when I was 19, then a 56-footer of my own design when I was 24, and have been a professional boatbuilder and fisherman since then.

Our family boat shop is building these now:





Here's my opinion: Gluvit is a hard epoxy product, and is not suitable for bedding things like the aluminum struts on that boat (which Jim calls A-frames), because it exhibits poor to no adhesion at all to metals. It will separate from the aluminum, and then the joint will leak, but you won't see it or know it because it's inside the joint.

Life-Calk is what I use for underwater fittings, and nothing else, and you BETTER GET THEM IN THE RIGHT PLACE THE FIRST TIME, because when you try to take them off, the Life-Calk also rips off the epoxy-glass covering over the wood, it has such extreme adhesion. It's easier to cut around the fitting with a chisel, then pull the fitting off, and you will only rip off a small amount of wood in the area of the fitting, then have to reglass that area, if you do it this way.

3M 5200 is a good compromise; it seals well, adheres both to clean metal and fiberglass and painted surfaces, and you can get the fitting off later by a cunning combination of sliding a razor blade around the edges of the area, then following with a sharpened, really thin putty knife to cut the rest of the 5200 seal and remove the fitting.

That's my story and I'm sticking to it,

With Warm Aloha, Tim
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Old 12-10-2020, 14:45   #4536
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Re: Trimaran - Especially Searunner - Owners

Tim,
Up until now, only Tom Seaver was my hero.

Anyone who designs and builds a 56-foot sailboat, not mentioning your other accomplishments, is a special person!
Mahalo from me in CA, having lived on Maui and the Big Island years ago.
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Old 13-10-2020, 05:11   #4537
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Re: Trimaran - Especially Searunner - Owners

Tim, I suspect the LifeCaulk you mentioned is their polyurethane version of 5200. Yeah, it's really good stuff. Standard Lifecaulk is easy to disassemble and can even be used in applications where the surfaces are wet when applying.

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Old 28-10-2020, 04:30   #4538
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Re: Trimaran - Especially Searunner - Owners

Altho i have read every post on this thread, and taken notes, i do not remember reading about use of drogues, and sea anchors on Searunners. I found this reading on this thread:
https://www.cruisersforum.com/forums...-241424-8.html

Victor Shane has an enormous database of case studies on drag devices. Here is the link to case studies of Searunners:

https://dragdevicedb.com/?s=searunner

A 40 a cuppla 37z a cuppla 34z and a 31 as well as other trimarans are in the database.

Well worth reading imho. Maybe i will post some conclusions as i digest the experiences of the above folks...

jon
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Old 29-10-2020, 06:15   #4539
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Re: Trimaran - Especially Searunner - Owners

That was really interesting, well worth reading. thank you Jon.


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