Subject: [harryproa] Re: moulds for Visionarry
From: "Robert" <>
Date: 8/28/2006, 8:32 PM

I am still not sure how much distortion from conic section one can
get from polyprop with 400 db glass on one side. For the lw hull the
compound curves aren't so tight but the extra longitudinal strength
needed may make it more difficult so I was considering adding all the
longitudinal stiffening on the inside in places of higher compound
Assuming just a little more than 4mm plywood, there shouldn't be too
much cutting and shutting on the bottom using KSS if you can get away
with half hulls going the other way.I am not sure if the same forces
can be applied so easily to a hull using the KSS system as using your
system so it may need some. There would have to be some cutting and
shutting to get the inward cuves on the upper parts of the side of
the hulls but not too many and it would be in the same area as the
windows which need reinforcing and extra fairing anyway.
For the deck edge I've always liked a texture to get a grip on and
the deck is going to have nonslip on it anyway.
Looking forward to seeing pictures of the monster

--- In, "Rob Denney" <proa@i...> wrote:
> G'day,
> Before you do anything rash, there should be some pictures and
build instructions of my new ww hull for a 50' solo race boat on the
next web update, due soon.  Worked pretty well although there are a
few things I will do differently next time. 
> Not sure yet whether we will be changing the designs, but if you
don't want or need any fancy 3 dimensional curves it is a very quick
way to build hulls.  Took me about 8 hours actual work (fair bit more
than this making mistakes and thinking) to get two half hulls and
decks ready to join amidships.  With some cutting and shutting, more
elaborate deck shapes will be possible.  Under water shapes are fine
as is.  Not sure whether the cutting and shutting will be more or
less work than KSS, but as they are only along one axis, and this is
on the deck so it is easier to conceal, less critical to fair and
should be less work.
> A KSS workshop would be a great idea.  Learn about infusion, table
making and tricks for getting panels how you want them, even if you
don't use the actual KSS technique.
> regards,
> Rob
>   ----- Original Message -----
>   From: Robert
>   To:
>   Sent: Saturday, August 26, 2006 4:40 PM
>   Subject: [harryproa] Re: moulds for Visionarry
>   I'm hoping to use a modificaton of the KSS system of derek kelsal
>   using polyprop honeycomb. I have made a couple of 1:20 models in
>   cardboard-of a Harry using the half hull technique and managed
>   something pretty close to the design as I remember it so it seems
>   plausible. Rob is playing with polyprop at the moment and he and
>   should have some idea of the practicality of the idea, though I
>   know how keen he is about once again having to modify the designs
>   be able to use the technique and i am not sure of the ethics of
>   slinging a few dollars dereks way for his intellectual effort.
>   Possibly going to one of his workshops would be a good idea.
>   regards
>   Robert
>   In, Doug Haines <doha720@y...> wrote:
>   >
>   > There are probably some ways of cooperating to make building
>   easier, and contacting others in the area is a good idea.
>   >   
>   >   Doug
>   >   
>   >   PS Nice sailing weather around, seabreezes and warm spring
>   starting.
>   >
>   > chrisultrabat <chrisultrabat@y...> wrote:
>   >   since I started this in ignorance, I should finish it ......
>   spoke to Rob Denney and he has
>   > convincingly said that the cost of moulds is very, very
>   substantial, and that in his opinion the
>   > investment is not merited.  also the design becomes completely
>   fixed, not allowing for any
>   > variation or progress without a big cost.  If I had read the
>   pages of this site, I would
>   > have seen that the topic was raised and dropped by about 2003.
>   >
>   > Chris
>   >
>   >
>   >
>   >
>   > 
>   >
>   >             
>   > ---------------------------------
>   >  Try the all-new Yahoo! Mail . "The New Version is radically
>   to use" - The Wall Street Journal
>   >
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