[MHml] Friction in lines and blocks

[Rob Denney]

G'day,

Lee hull has to be high for the beam clearance, so it doesn't make
much difference.  The tetrahedron would be stiffer, but I would still
want the beam to be sufficient on it's own, plus there is the added
windage.

regards,

Rob

On Dec 11, 2007 1:16 AM, sysfx <sysfx at yahoo.com> wrote:
>
> Rob,
>
> You probably increased the lee hull height in the center to achieve the same
> effect in a smaller scale (greater leverage arm supporting the mast). I
> imagined two beams forming a tetrahedron with the mast and mainbeams, so the
> entire boat becomes stiffer in all directions. It certainly looks cleaner
> and as is, though.
>
> Luiz
>
> > Much easier to use the lee hull, which is already there than to add the
> complexity and windage of the struts.  Two beams will not do it unless there
> is something stopping them moving up and down.
>
>
> > > ...demonstrated that the use of two solid struts to support the mast at
> about boom level (google "Hobie Bravo" to see it) almost cancels compression
> on the main beam (=lighter structure), greatly reduces mast flexion (=
> lighter mast) and, since the struts' forces on the structure are mostly
> horizontal and outward, the tramp tension helps cancel them (=lighter
> structure).
>
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