|Subject: Re: [harryproa] Easy boatbuilding, Re: Attention australian builders|
|From: jerry freedomev |
|Date: 4/21/2007, 12:47 PM|
Hi Rob and All,
> Rob Denney wrote:
> > G'day,
> > Most builders have read about the Kelsall KSS
> > http://www.kelsall.
> > <http://www.kelsall.
> building boats and
> > wondered if it is really possible to build hulls
> this quickly. If
> > they are, it makes a mockery of spending weeks
> gluing, glassing,
> > bogging and sanding strips of wood or foam in the
> traditional strip
> > plank method, or any of the heat it, bend it and
> screw it foam techniques.
The short answer is yes, they can be built
that fast!! Not only that, but I've built them that
way to 80'/25m.
I've been building flat panel FG boats off of
table/flat molds for 25 yrs.
How I became a multihull designer was when
asking for advice back in 76? of Kelsell when he stole
the design ideas and showed up 3 months later in
Multihulls Magazine as the Kelsall 32 Cat ;^D. Expect
your designs, ideas to show up in his plans soon I'd
bet as his!
At that point I understood if I was good
enough to steal from, then I could design my own and
did, building over 400 boats, about 40 multihulls and
6 tacking proas in all masterials. Not that I minded
being stolen from by a big designer as it's was a kind
Why would you build a Harryproa or any
sellable boat one off and not take a FG mold off it?
FG molds don't cost that much and very easy to do.
It's the plug that takes the work.
Then everyone after would be able to have a
first class FG one would seem to be a smart business
It takes me less than 8-10 man-hrs to build a
40'/12m hull in FG including all prep. About the same
to do my composite monococque Electric car
body/chassis I'm now doing with molds.
Now with Tortured Plywood/epoxy method I can
build a 40' hull in about 10 hr.
I've also built tortured FG by the same way I
do plywood/epoxy, making a 32'x7' panels on a flat
mold. This works fairly well though depends on it
being caught in the right stage of curing, between 1
and 5 days after being laid up depending on temp,
resin used. Composite masts can be built that way
While I love strip plank, I'd never build one
that way because it's too much work and cost.
His resin infusion is probably too much work.
Not the actual infusion, but all the prep, afterwork,
costs nessasary. Just pour out the resin and squeegee
it out, pop on the core, lay up the inside gives just
as good. Being flat so resin doesn't run down is the
key to making it easy to layup too besides the outside
being finished by the mold.
Welcome to the world of fast boatbuilding!
It's where the profit is!!
> > Harryproa have decided that this development is
> too good to miss
> > and have paid Derek to adjust the design of the
> hulls of the 15m/50'
> > proa we are building for me to race in next year's
> Solo Transpac. As
> > part of the deal, Derek is putting on a 4 day
> workshop at our factory
> > in Urunga (midway between Brisbane and Sydney, 20
> minutes south of
> > Coff's Harbour) to demonstrate how infusion and
> KSS work. He reckons
> > that at the end of it, we will have the hull ready
> to top coat paint,
> > and a 15m vacuum table. It would take more than 4
> days to fill and
> > fair the hull of a 15m strip planked boat, so
> this will be a very
> > impressive achievement.
> > The workshop is from 17-20th May (just before
> Sanctuary Cove show).
> > Anybody who wants to attend is welcome, at a cost
> of $500 for the 4
> > days. This includes lunch, morning and afternoon
> tea, the chance to
> > participate in the build and to pick Derek's brain
> on the technique.
> > Mostly though it gives you a way to save a huge
> amount of time
> > building your own boat. Local low cost
> accommodation is being
> > organised.
> > Anyone interested in attending, please email me at
> > <mailto:firstname.lastname@example.org.
> > regards,
> > Rob Denney
> > www.harryproa.
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