There are a few ideas around for non-rotating masts. The aerodynamics of the means of sail attachment might have some detrimental influence in what you propose compared with a rotating mast. On the other hand if the track is aerodynamically smooth it could be better than a rotating mast.
With regard to the "bearing" take it as meaning the point of application of a force, as in a load bearing surface, rather than something that provides a pivot.
If you do not intend to fold often then you could have fixed attachment points for the beams at the gunwale to spread the load points in the beam to reduce the forces required to take the moment. The 18mm proa has the beam passing through the lw hull so it is attached into either side of the hull to get the maximum spread of the load bearing surfaces.
I cannot see any merit in having the mast stub pass through the crossbeam. It does make sense to create a strong point in the hull at each mast beam connection but then separate the bearing points as far as hull dimensions permit to reduce the forces required to handle the moments.
On 24/04/2016, at 11:10 AM, "lucsimard@ymail.com [harryproa]" <harryproa@yahoogroups.com.au> wrote:
Rick, I was assuming for my design that the fix mast with the sail attached on the lee side of the mast would work ... so no bearing. Do you you think it would work then ?
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Posted by: Rick Willoughby <rickwill@bigpond.net.au>
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