Referencing Uber’s Elevated Challenge

Dean Sigler Batteries, Electric Powerplants, Sky Taxis, Sustainable Aviation Leave a Comment

We can tell things are heating up in the electric aircraft marketplace.  Established aircraft companies are investing (Boeing and Airbus for starters), growing numbers are planning for electrified and autonomous future flight (Uber Elevate Summit), and an absolute plethora of new designs are tumbling forth from an aeronautical cornucopia.  Their video of an Uber sky taxi ride illustrates the charm of the idea. A Common Reference Uber provided two common reference eVTOL (electric vertical takeoff and landing) reference models for partners to emulate.  Both seem to share a common passenger pod with an unusually long tail boom. Perhaps taking the 2011 Green Flight Challenge as his reference point, Mark Moore explained how Uber inspires others to give their best efforts to create several plausible vehicles.  The American Institute of Aeronautics and Astronautics (AIAA) reports, “’We will never build a vehicle, but we want to make sure that our partners who are building vehicles are successful and that these aircraft are …

Ultra High Lift Without Flaps

Dean Sigler Diesel Powerplants, Electric Powerplants, GFC, Sustainable Aviation 1 Comment

Dr. Gecheng Zha, an Associate Professor with the University of Miami has an impressive set of credentials, culminating in a Ph.D.from the University of Montreal, Ecole Polytechnique.   That, and his impressive body of work helped impress the audience at the seventh annual Electric Aircraft Symposium this last April. His work over the last decade has focused on generating high lift and low drag through circulation control on wings – even leading to the concept that wings can generate thrust instead of drag.  This integration of aerodynamic forces would lead to highly efficient aircraft capable of flying on little – or even no power. Earlier attempts to increase lift and decrease drag have relied on sometimes complex, multiply flapped and slotted wings which require powerful mechanical actuators to work their magic. Others have used rotating cylinders laid spanwise on wing leading and trailing edges, or active suction or blowing to achieve their goals.  Zha has looked at these and other …