[JoeF]

Explore various "VG" systems for HGs.
Discuss. Specify. Pros and cons of various VG systems.

Notice that even an elementary Rogallo SS HG varied its geometry when loading the left or right sail differentially by simple weight shifting of pilot's CG; the shape of the sails change upon changes of position of the pilot. That system may be revisited. Other VG systems in HGs may be described and discussed.