Is bulkhead tabbing now redundant?

sorry!

sorry I do not want to have anything what so ever to do with this post again . ifeel very strongly about all that's happening and don't want to know any more! you do what ever you want . your funeral and I don't want to know anything about it !!

 

No need to be sorry, but inviting people to their own funeral is a bit uncool.
Obviously if critical hull to deck & transom joins can be successful if correctly designed using adhesives & no glass, other parts of a vessels structure might be installed in a similar fashion. I'm all for continuity of fiber myself, but if the right joint design & adhesives can be successful & proven why not?
Regards from Jeff.

 

the last AC mono's didn't have any bulkheads and that technology is filtering down to the pleasure industry( assuming they can catch up)
So we have crash bulkheads for water tight integrity, any reason to have any more?

 

I sailed on raceboats decades ago who had no true bulkheads. Nothing new.

For cruising yachts bulkheads are logical and desirable

Engine rooms, tanks, waterproof compartments. interior accomodation.....

 

How much closer to an answer to the original question are we now?

 

You will never get a definitive answer because there are so many permutations of type of boat, conditions under which it will operate, shape of hull, type of resin, type of reinforcement, type, density, and thickness of core, laminate schedule, and dozens of other variables, any of which could make a significant difference. As I understand it the OP is wanting to avoid labour time and still make a super-lightweight, but sufficiently robust structure, and one that doesn't offend the eye ! Quite an essay.

 

Indeed.
Just get in line in the long que of those wanting the same...

 

For the catamarans im looking at, the calculatiions are telling us its in the ballpark. So we have to verify now by destructive testing the exact joint and panel we intend to use. Thats where is is now... when I grt around to it, ill show the results along with all details of the laminates and adhesives used etc

 

Like a mystery novel with so many anti climaxes and no end in sight, tunnels got so bored he walked away.

 

Adhesive Bonding of Bulkheads

...a reference from EuropeanBoatbuilder...

Check out the stength and ductility of this adhesive product.

 

Oh dear, that looks familiar!!
As shown here: http://www.boatdesign.net/forums/fi...lkhead-joining-question-45735.html#post603633

 

But they didn't use any tabing of additional glass layers, did they? I don't see them?

 

hey good point...I also don't see any core or indeed laminate for the hull and bulkhead they obvious saved weight that way too, genius!!

It is a simple diagram for publication, what else do you expect, especially given the nature of the article: the use of crestomer. Anything else is not relevant....just like the sketch dwg. Since it is not a construction dwg!

 

In the blurb, it specifically states the bulkheads are bonded in as opposed to wet laminated in... to me this implies they are not tabbing, but of course is open to interpretation.... contacting scott bader might help clarify...

 

Indeed. But the article also only says that the product is Class approved, thats all. It does not say that the joint in that configuration is Class approved.

The joint i reference in my post above, was required for DNV approval, for a catamaran I designed about 2 years ago.