|Modern sloop rig
Jib at each end, headstays also hold up rotating wing mast; very simple, no technical challenges, method already proven on Russel Brown proas.
(see roller furling example)
No jibs, easier to shunt, rear rudder heavily loaded, use front rudder for steering?
Main and jib rotate together, 180 degrees on each tack. Lightweight modified wishbone rig composed of struts and wire stays.
A wide variety of rigs are possible and have been considered. Perhaps the best choice is the "modern sloop rig" because it is conventional, well proven, high performance, easily optimized with wing mast, furling headsails, light air screachers, etc. Also considered were catboat and schooner rigs (two masts).
We came up with an ultra-lightweight version of our own called the "Bucky Boom", inspired by Buckminster Fuller, though it too has some problems to be overcome.