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  #46  
Old 08-19-2016, 09:43 AM
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brian eiland brian eiland is offline
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Quote:
Originally Posted by bajansailor View Post
....
She has an interesting construction method using a polystyrene foam core sandwiched between plywood skins - the second last photo shows a small detail re this.
That detail makes the vessel sound really suspicious to me...

...polystyrene foam...how would you ever get a proper bond between that foam and the skins
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  #47  
Old 08-19-2016, 09:59 AM
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I also have my doubts about using polystyrene foam as a core. Especially re getting a good bond between it and the plywood.

There is a photo on this page of Dudley's build photos showing the foam core being installed on the hull side :
http://www.dixdesign.com/dh550%20build5.htm
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  #48  
Old 08-19-2016, 11:28 AM
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http://www.dixdesign.com/dh550%20build5.htm
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Slabs of styrofoam insulation close-fitted between stringers and glued to hull skin
as insulation, maybe OK
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  #49  
Old 08-19-2016, 08:21 PM
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It acts as insulation and makes it look nicer. Stringers make a boat look home made but give the strength not the foam. I expect it gains a some stiffness from the foam and it would make the boat float higher in case of a total flooding.
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  #50  
Old 08-25-2016, 12:29 AM
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Quote:
Originally Posted by bajansailor View Post
I also have my doubts about using polystyrene foam as a core. Especially re getting a good bond between it and the plywood.

There is a photo on this page of Dudley's build photos showing the foam core being installed on the hull side :
http://www.dixdesign.com/dh550%20build5.htm
I corresponded with Dudley Dix about this a few years ago; The outer skin is quite thick and the stringers are sufficient for stiffness. The polystyrene is there simply for insulation, and considering the target market climate, makes sense to me. The inner skin, which is fairly thin, dresses up the interior. Might make a small contribution to stiffness in closing a box beam, but the poly is not intended to be structural.
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  #51  
Old 08-25-2016, 06:18 AM
redreuben redreuben is offline
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Christ imagine all that squeaking in a seaway !
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  #52  
Old 08-25-2016, 08:31 AM
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Christ imagine all that squeaking in a seaway !
That might just be true ?
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  #53  
Old 08-28-2016, 03:05 PM
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Here is a thread that might be relevant to the OP.

Minimum cruising cat-size & cost
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  #54  
Old 03-31-2017, 02:50 PM
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Dudley Dix catamarans now available in kit form,...precut panels

http://www.exocetus.net/
Quote:
Exocetus Marine designs and manufactures plywood kits and components for the Dudley Dix range of catamarans.
Why Buy a Kit

__________________
RunningTideYachts.com
Distinctive Expedition Yachts
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  #55  
Old 04-08-2017, 07:05 PM
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Unless you want a "Roomeran" (ie: Piver), then my choice for a fast cruiser for a crew of four, is a Crowther Kraken 40.
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  #56  
Old 04-08-2017, 07:10 PM
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Originally Posted by oldsailor7 View Post
Unless you want a "Roomeran" (ie: Piver), then my choice for a fast cruiser for a crew of four, is a Crowther Kraken 40.
Don't forget to saw the handles off your razors.
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  #57  
Old 04-09-2017, 05:32 PM
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Don't forget to saw the handles off your razors.
please explain.
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  #58  
Old 04-10-2017, 06:15 AM
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Quote:
Originally Posted by oldsailor7 View Post
please explain.
Serge Testa sawed the handles off his razors so they would fit on board when he sailed around the world on the worlds smallest boat to circumnavigate. The comment was fairly cryptic I will admit
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