Vectors
Hi,
The jibstay's lateral load component is what the bowsprit shrouds (you almost certainly do not have whisker stays) deal with. Assume about 20% of the jibstay's load going lateral, when on the wind. From there you can work out the bowsprit shroud loads, based on the angle to the centerline. They are typically the lightest-loaded wires in the boat.
You'll find the diagram for bobstay loads in the "Apprentice."
Fair leads,
Brion Toss
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