Spreader and shroud loads- swept aft

[Brian Duff]

Hi Riggas

so, brions book has some great math for calculation shroud loads, but I am wondering about some slightly more complicated calculations for simpler rigging... I want to understand how to calculate loads seen by these rigs which carry a single upper swept aft and a single lower lead aft to same chainplate, with no backstays carried - but not full B&R rigging.

This is basically an attpt to further what idid at boatshow, by expirimentinf with my own westsail. I want the ability to carry a full headed mainsail which precludes standing backstays- I also intend to run the staysail to near masthead seeking more power in light winds through bigger mainsail and headsail, better running through twin long luffed headsails-

so, I am trying to wrap my head around combining the side and backstays loads and supporting all that not directly from the side of the rig.

Ps I do have a different mast section than most westsail, and understand that the math may prove I need completely different rig and compression structure, but where do I find said math?

Excuse my iPhone typing.