Hello, I'm a former grad student with a Master's in Mechanical Engineering (emphasis on Dynamics and Controls) and I'm thinking of going back to school for a Ph. D. I'm very interested in technologies involving the use of endurance UAV's (UAV's designed to stay in the air for weeks at a time) with the ultimate goal of being a cheap alternative to communications satellites. I am also interested in all things autogyro/gyroplane/gyrocopter but it seems no one cares about that technology lol. Would anyone happen to know professors or universities that do research related to either of these things? Thanks!