[quote=Andinista][quote=MN3]Reduced, not eliminated - for sure
but i THINK the force "direction" is also moved - no longer trying to tow inward but the forces moved into a more straight upward direction.
the hulls have a lot more strength in this direction of force
[/quote]
The force direction changes but its magnitude changes even more. Direction is simply the direction of the bridle.
The following happens assuming there is no jib and looking from the front (simplifying a bit)..
The vertical line is the vertical component of the force and the horizontal one is the inward force applied to the hulls. The hypotenuse is the tension of the bridle
[img]https://www.thebeachcats.com/gallery2/main.php?g2_view=core.DownloadItem&g2_itemId=129538&g2_serialNumber=3[/img]
As the angle changes the inward force is increased or reduced but the vertical force is kept constant, because it equals half of the tension of the forestay
You can see on the example that the inward force is more than doubled with such an angle change. And that it can be similar in magnitude to the vertical force.
When you put a spinnaker it becomes more tricky, there lateral forces will increase the stay and the bridle tensions to compensate.
I still tend to think that the most significant forces come from the main and mainsheet. The forestay angle multiplies that force because of its angle (now seen from the side). And the bridles amplify that effect again as explained.<!-- editby --><em>Edited by Andinista on Jan 09, 2018 - 03:43 PM.</em><!-- end editby --> [/quote]
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