I have found the simplest, easiest way to build a flat panel hull is to build a frame to support the shell upside down during the construction. Lay up one side of the panels as flat panels. Cut them to shape by matching to the frame then sheath the outside of the shell in one go. That produces a lightweight shell that can be inverted; frame removed then the chine seam taped. That gives a shell that generally holds its shape while other stiffeners can be sheathed in. The only requirement is to ensure the stem and stern (or second stem for a proa) remain true until the hull is enclosed and gains torsional rigidity.
No vacuum bagging required. The only requirement is to get the full sheathing on the outside done before the epoxy cures.
The main benefit is avoidance of taped joins on the outside so the fairing requirement is reduced to filling the weave. This achieves a weight similar to an infused hull in a mould.
On 29 May 2018, at 1:22 am, StoneTool owly@ttc-cmc.net [harryproa] <harryproa@yahoogroups.com.au> wrote:and therefore these structures can be built one of two ways. Either as 3 separate panels joined at the seams later, or in a mold that begins with the desired shape.
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Posted by: Rick Willoughby <rickwill@bigpond.net.au>
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