Subject: Re: [harryproa] Re: PLOYSTYRENE AS A CORE MATERIAL?
From: Doug Haines
Date: 6/15/2006, 9:51 PM
To: harryproa@yahoogroups.com.au
Reply-to:
harryproa@yahoogroups.com.au

Rob,
 
What do you mean you wouldn't go wider 7.5 x 3.8 seems a bit narrow?
 
It'll stay in the water.
 
6oz US dacron. Rolly Taskers Phuket
 
Doug

Rob Denney <proa@iinet.net.au> wrote:
beam is what fits on the trailer in the telescoped position.  Can go wider, but I wouldn't.  Good deal on the sails.  What are they made of?  I will try to get to Maylands next week.
 
regards,
 
rob
----- Original Message -----
From: Doug Haines
To: harryproa@yahoogroups.com.au
Sent: Thursday, June 15, 2006 3:51 PM
Subject: Re: [harryproa] Re: PLOYSTYRENE AS A CORE MATERIAL?

Thanks, thats a good idea about the 3mm ply, I'll try that as i have bought the polystyrene anyway.
 
Laying out the beams now it strikes me as being quite narrow. The whole boat that is. I've got about 3.8m overall beam. Can I widen this to 4.5m? Is that length 3.8m to do with still fitting on the trailer?
 
I've decided to kind of fix the beams in the building, and leave the option to maybe some other owner who could convert this back to a demountable pinned type of beam. This is just easier for be right now.
Also I'm heading off from Mandurah next Tuesday to complete in about 4 weeks at Maylands boat yard, so call in to Maylands later in the week to see me.
Ordered two sails, luff sleeves, 6m luf for bridges from Phuket US $960.
 
I hope to make your rudder set up in a couple of weeks.

Rob Denney <proa@iinet.net.au> wrote:
G'day,
 
Sorry, I missed this.  Doug, please send any questions to me as well as to the group as I am having continual problems with Yahoo.  Ta.
 
Polystyrene will not work on areas where you are walking on it, as it dents, then leaves a void under the glass.  Eventually it all falls off.  You can put 1-3mm ply each side but it is better to use a decent core.  Foam, polypropylene (Boatcote or Polycore Aus) or paper honeycomb (ATL) are recommended.   
 
regards,
 
Rob
----- Original Message -----
From: Robert
To: harryproa@yahoogroups.com.au
Sent: Tuesday, June 13, 2006 10:31 AM
Subject: [harryproa] Re: PLOYSTYRENE AS A CORE MATERIAL?

For long term use I'd stick with a quality foam or honeycomb. The
resin , glass and exposure to nasty materials is still the same price
for a core that can out gass and generally not perform as well. For a
discourse on this there is something on the proafile yahoo group I was
wondering for the marginal extra cost of going to 20mm for the core in
polycore polypropylene honeycomb,
Robert --- In harryproa@yahoogroups.com.au, "doha720" <doha720@y...>
wrote:
>
> Could it be used to make the flat platform on the camper?
>
> 15mm expensive foam sandwiched with 400db is stated on the plan.
>
> Was buying the polystyrene for the end caps today and thought...
>
> Doug
>




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