Krossblade Aerospace is a team of individuals (including accomplished engineers and physicists) formed out of heatsynclabs in Mesa, Arizona. Their goal is to bring faster, better air travel to more people; right now, they are working on the “concept and proof of concept of a vertical take-off transformer airplane that seats five people as well as a smaller drone version.” In addition, their website has a wealth of information about the physics of aerodynamics and the history of quadcopters and multirotors (like the Oehmichen No. 2 Quadcopter from 1924, pictured above) It includes well-written information about VTOL (Vertical Takeoff and Landing). They present both the advantages and the difficulties associated with accomplishing this type of flight. Their proposed VTOL airplane looks to be a challenging and fascinating project — keep an eye on this team!