Coandă effect and further developments
In 2008 the project is first supported by Dassault Systèmes with the Passion for Innovation Program, EADS Innovation Works (the R&D department of Airbus Group, and now : Airbus Innovation) and MBDA. The project evolves in a single-seater aircraft with inverted V-tail nicknamed the Colibri because it would perform a vertical angled take-off like a hummingbird. The Dassault Systems adress : http://perspectives.3ds.com/design/xplorair-a-new-mobility-concept/
The exhaust gas temperature (EGT) of the thermoreactor using the Humphrey cycle being lower than in the conventional Brayton cycle by hundreds of degrees, the exhaust airflow out of the propelling nozzles at the trailing edge of the front wings can be directed onto the upper surface of the rear wings. The speedier airflow and the resulting Coandă effect around the curvature
allow a higher lift coefficient and a smaller wingspan. This technique is quite similar to the blown wing used notably on the Breguet 941, Boeing YC-14 and Antonov An-72.