Note: Elytron Aircraft LLC, a Silicon Valley Aerospace startup with the goal to design the most efficient and safest VTOL aircraft, has been inventing, patenting, designing, building and testing several test vehicles at manned and unmanned scale. After four years of Research and Development, including simulations, wind tunnel, and airfield testing, its tilt-wing technology was fully understood, characterized, and optimized for production. 2017 has highlighted different technical challenges specific to the manned and unmanned industries. So the activities of Elytron, as an R&D organization, have been wound down, and two independent companies have been launched to pursue commercial applications, one in the drone market (VTOL Aerospace), and one addressing the market for scheduled door-to-door transport (Transcend Air).