The reason lighter cats are safer?

[Factor]

Originally Posted by 44'cruisingcat

Nice!

This is an oldie but goodie:

https://youtu.be/FWINygISxDE

This is a favourite of mine
https://youtu.be/13cWnp-aaDE

[arsenelupiga]

Originally Posted by Factor

I thought you were Australian?

heritage of pre-australian times of my life. some things just stay unabated.

[arsenelupiga]

Originally Posted by smj

And you don’t think people on lightweight catamarans are comfortable? I’ve sailed on a couple of Lagoons and to be honest I could never get used to the creaking and groaning of the bulkheads and furniture. Does that occur in a choppy anchorage as well as under sail? Our lightweight cats have been silent under sail except for 5he sound of the water rushing by.

there are obviously different levels of finishes in lagoons, no idea why our better built. Our does not creak or anything else. We get noise in 1 spot maybe 1x a year when really dry <30% moisture levels. but bit of wd 40 sorts it out till next time. In near 9 years shrouds still hold firm on 25 apparent reaching. Never retensioned. How are your shrouds? Flapping in 15 kn apparent ?

[CatNewBee]

Originally Posted by 44'cruisingcat

Exactly what do you think your boat is made of?

Well, below the waterline, solid GRP. Above the waterline Balsa blocks cored. All infusion bagged and Vinyl-Ester soaked, on the outside is gelcoat and then antifouling (in my case Coppercoat - epoxy based and a good osmosis barrier.

All furniture is marine plywood, most is glued and bolted but some of this can squeek, especially panels, bulkhead decoration panels and frames, they are only screwed on for easy removal and tend to become noisy. Many structural enforcements / bulkheads are marine ply. Some are laminated, some are glued on. Deck and hulls are glued and screwed to each other.

What do you think my boat is made of?

[Matt Johnson]

Originally Posted by CatNewBee

Well, below the waterline, solid GRP. Above the waterline Balsa blocks cored. All infusion bagged and Vinyl-Ester soaked, on the outside is gelcoat and then antifouling (in my case Coppercoat - epoxy based and a good osmosis barrier.

*Polyester infused. Vinyl ester is just the outer layer for osmosis protection. But who's counting?

Matt

[arsenelupiga]

Originally Posted by Matt Johnson

*Polyester infused. Vinyl ester is just the outer layer for osmosis protection. But who's counting?

Matt

what does it mean can you please elaborate?

sorry, i am totally uneducated in this area.

[Sailmonkey]

Originally Posted by arsenelupiga

what does it mean can you please elaborate?



sorry, i am totally uneducated in this area.

Means the majority of the structure has had polyester resin sucked into it. Then the whole thing over coated with vinyl ester.

[CatNewBee]

Originally Posted by Sailmonkey

Means the majority of the structure has had polyester resin sucked into it. Then the whole thing over coated with vinyl ester.

I dont think so. The hulls are built at once: separator vax, gelcoat sprayed on, then the mats and core layup, vacuum bags and infusion resin, I am pretty sure they use vinylester for the whole package, no extra coating on the gelcoat inside.

[arsenelupiga]

Originally Posted by CatNewBee

I dont think so. The hulls are built at once: separator vax, gelcoat sprayed on, then the mats and core layup, vacuum bags and infusion resin, I am pretty sure they use vinylester for the whole package, no extra coating on the gelcoat inside.

manual:
The LAGOON 400 is built of balsawood sandwich (monolithic below
the water line),polyester resin and vinyl-ester; the counter-mould
sare monolithic and the partitions are made of laminated plywood.
The nacelle and deck are of balsawood sandwich composite.

We had 2x serious impact on our hulls and both times superficial damage only so my opinion is that boat is built very well. Also rigging very stiff and not adjusted in 9 years.

[arsenelupiga]

Originally Posted by arsenelupiga

manual:
The LAGOON 400 is built of balsawood sandwich (monolithic below
the water line),polyester resin and vinyl-ester; the counter-mould
sare monolithic and the partitions are made of laminated plywood.
The nacelle and deck are of balsawood sandwich composite.

We had 2x serious impact on our hulls and both times superficial damage only so my opinion is that boat is built very well. Also rigging very stiff and not adjusted in 9 years.

more detail
• The anti-osmosis barrier systematically created by the use of vinylester type resin on all the Lagoons is a guarantee of durability.

so my guess would be Lagoon uses vinylester resin on waterside of hull and continues with polyester to build whole thickness of hull under water.

Never heard of osmosis on Lagoon.

[smj]

Originally Posted by arsenelupiga

more detail

• The anti-osmosis barrier systematically created by the use of vinylester type resin on all the Lagoons is a guarantee of durability.



so my guess would be Lagoon uses vinylester resin on waterside of hull and continues with polyester to build whole thickness of hull under water.



Never heard of osmosis on Lagoon.

I think that’s a pretty standard layup for most production sailboats built nowadays.

[Tupaia]

Originally Posted by Sailmonkey

Means the majority of the structure has had polyester resin sucked into it. Then the whole thing over coated with vinyl ester.

No moulded boats are built like this over coating afterwards would require fairing and finishing that negates the whole point of using a mould.

[Sailmonkey]

Originally Posted by Tupaia

No moulded boats are built like this over coating afterwards would require fairing and finishing that negates the whole point of using a mould.

I suppose I was being too literal.

Ok, so in the mold the gelcoat is sprayed, followed by vinyl ester, then glass with poly sucked in.

[Sand crab]

So is the vinylester just sprayed on the mould and not infused into the glass?
How does Seawind do it?

[Sailmonkey]

Originally Posted by Sand crab

So is the vinylester just sprayed on the mould and not infused into the glass?
How does Seawind do it?

That’s a question for the layup schedule of the manufacturer