Subject: RE: [harryproa] Re: elementary and elementary cruiser
Date: 1/23/2007, 7:05 AM

Hi Herb,
Using flat panels without chines will give you either conics or cylinders which limits your hull shape. If you want compound shapes from flat panels you have to either torture the panel (early plywood Tornados) or use chines. Kelsall's KISS method uses flat topsides and a series of lobsterback cuts below the waterline which need bogging to form a compound curve. Again pretty restrictive though probably well suited to our long, thin, rockerless hull shapes..
The Transpac leeward hull will be a long cylinder with faired foam ends.
Mark Stephens
-----Original Message-----
From: [] On Behalf Of Herb Desson
Sent: Tuesday, 23 January 2007 6:03 PM
Subject: [harryproa] Re: elementary and elementary cruiser


Rob seems to be creating some fair lines in the transpac harry with
his flat panel hang from the ceiling method. Is that method working
or does it have some bugs?

Best regards

--- In, <mark@...> wrote:
> Kit boats are a lot less intimidating for some people compared to
> from plans where you source all your own materials, do all your own
> set up strong back and temporary frames, do large areas of glassing,
> lots of dust from grinding and filling etc. Kit boat are self aligning
> requiring less skills, less mess, less VOCs, and you end up with a very
> light boat as the panels are heat pressed under factory conditions.
The best
> part is much less hull fairing as only the chine taping needs to be
> All bulkheads, beam panels, Easyrig booms, rudder components,
walkways and
> interior fitout can be precut saving a lot of time as the cnc
cutting is so
> accurate. The kit arrives as a stack of 2400 x 1200 DuFlex panels with
> prescarfed edges ready to glue side to side. To remove the parts you
> the tabs holding the parts in place. Bit like a balsa aeroplane kit.
> Of course there are trade offs. Kits are more expensive and the boat
has a
> flat panel look. There are probably more home built kit catamarans
now than
> any other building method and I suspect the people building them
> have attempted a boat any other way. Flat panels don't have to look ugly
> either. Some designers get around this by strip planking some parts
like the
> saloon top and gunwales to get away from the plywood look. The multi
> are mostly under water, and no they don't make any noticeable
difference to
> performance.
> I haven't drawn anything yet so not sure how good I can get a Harry
to look
> in flat panel. Just throwing the idea out there to see what people
> Mark
> ...................................
> Mark Stephens
> <>
> -----Original Message-----
> From:
[] On
> Behalf Of oceanplodder2003
> Sent: Tuesday, 23 January 2007 2:47 PM
> To:
> Subject: [harryproa] Re: elementary and elementary cruiser
> I'm not sure I see any advantage in a hard chine duflex boat. More
> expensive, not pretty against faster build time. What about weight
> compared with strip kiri and glass?

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