I am wondering how the whole non-tank upper portion of Starship maintains its integrity during high-stress situations (ascent, reentry, belly-flop). The tanks are pressurized, but I assume that the nose cone is not and therefore it seems that it would not be stiff enough to withstand flight and maneuvering in the atmosphere on its own.
I am thinking about some support struts, webs etc.
This question assumes that the fairing is made in a similar fashion as the tanks, i.e. just plates and rings of steel as I haven't seen any pictures suggesting otherwise.