The concept of eVTOL aircraft emerged in 2009 when a video of the NASA Puffin eVTOL concept[2] went viral on November 11th 2009 showcasing a single person concept rendering of the technology, and concept in flight. Following this, the first Puffin paper at the VFS Specialists Conference on Aeromechanics, on January 9th 2010. This concept utilized a new technology developed at NASA called Distributed Electric Propulsion (DEP).