CSC 30 Catamaran- the coastal passage

foam in the keel area or solid glass?

 

Hulls are all foam

 

thanks for the quick reply
I remember seeing recent photos of Schionning cat that had been run aground
the bottom was just ripped right out with extreme prejudice. ugly sight.
Yeah, the weight goes up with solid, but ---

 

Foam boats survive collision damage better than balsa or ply ask Rob Denny he has done destruction testing with Roger Simpson some time ago.
We all pick our own poison . Solid Glass is great but heavy and more difficult to build with,unless you have a mould.
Al

 

Now Schionnings seem to concentrate on the 12 meter up market. There is supposed to be a shorter Arrow in the works - but I'll be surprised if its smaller than 11 meters (9.5-10 meters would be cool).

Dialdan, your Cosmos looks great. What size is it? can you post some more pics?

The one Schionning I am surprised no one seems to have built is the RB 1060....with either rig.

 

Hi Jamez
My Cat is a Schionning Cosmos 930( 30' 6") best to look in my Gallery for more pics.
Al

 

Some time ago is right. About 30 years! The testing was for Qld survey. We were trying to convince the authorities that Durakore (end grain balsa with 3mm of hardwood veneer each side) with glass each side was comparable to their spec for solid glass and foam/glass. The test was dropping a 10 kg steel ball from increasing heights onto a 600 x 600 panel in a steel frame. The Durakore with 2 x 600 each side was better than the solid glass (can't remember how much glass, but "shitloads" would be close) and better (and heavier) than foam/glass panels. Pretty unrealistic test, but fun to do with a lot of interested parties dropping by to watch, offer advice and talk boatbuilding bs.
Were you one of the spectators/helpers dialdan? Agree with your post #252.

Gus:
Thanks for the praise. Good luck with your build.
In case there is any confusion, my advice was to build the cat in foam/glass using a cheap mould for the hulls, with one unstayed, self built mast.
Please keep us advised of progress and if I can be of any help don't be shy about asking.

I think the Exhilarator 40 harryproa.com/?p=994 will be cheaper again (less material, easier build) than the 40' cat. Less room as well, but it will fold to fit in a marina berth. We've just sold a set of plans for a liveaboard version, which has a lot more space. Build won't start for a while, but it will be interesting to compare times, costs, etc vs the ply cat.

 

Hello.

Nice boats view here.

This is a first attempt to interior distribution , the bath and kitchen not at scale but for a position idea.
Two bow double bedrooms, main at starboard.
One stern starboard berths room.
Main bathroom and kitchen at port side.



Im thinking in the best relation for a sail vessel between rudder and wheel is 1:12
For two complete wheel turns from port side to starboard = 60º rudder movement.
360º/12=30º

Regards.

 

Hi Rob
Neither an interested party or helper , saw it in a Multi mag (probably still have it somewhere) if I remember correctly the inside skin on the foam sample remained intact so you would have got home safely anyway.
A little silly to dish out isolated cases of any boat running aground whatever they are built of too many variables .
like I said my most enjoyable build was with foam .

Cheers
Al

 

No rush, but if you ever come across the article, could you email me a copy, please.
Ta.
rob
harryproa@gmail.com

 

Rob
Couldn't scan it in ,plus i am on satellite so would take forever ,
posted the whole mag to your address.
You owe me a beer.
Al

 

Pretty much what I said Only in the design stage you can add to the bows too. Retrospective bow extensions are much harder than stern extensions. But the best results are always going to best if you have the length designed in from the start.

http://www.boatdesign.net/forums/mu...aran-coastal-passage-40774-13.html#post764065

 

The length is designed in. It's a 30 footer.

 

True, otherwise it would become something else.
I suppose that this CSC 30 is like a low cost entry looking for max onboard living at the length, the vert sterns give an easy attach & geometry for simple pintles and gudgeons, the mullet extension might complicate/compromise this although the stern/swim steps are great for safely loading people & groceries- we see heaps of this especially on mid to older performance cats where the desires of the owners haven't kept up with the buoyancy available, lots of designers dreaming about performance when the market was looking for comfort- plenty comfy options now, really like Dennis says it needs to be designed for, the bow and stern extensions add buoyancy to the picture out beyond existing connective structure(beams)... this needs consideration especially to this level of design, I've seen some extreme extensions with no input to beams, may all be fine on flat water but not where it counts.
J.

 

Indeed I do. Thanks a heap.
Let me know next time you are on the Gold Coast. Give it a couple of months and I will take you for a spin on Bucket List as well.