DARPA : projets de VTOL
Lire sur http://www.darpa.mil/program/vertical-takeoff-and-landing-experimental-plane/ et http://www.darpa.mil/news-events/2014-03-18 Et aussi [youtube https://www.youtube.com/watch?v=3b_YQgfa7OA&w=560&h=315]…
Un drone hybride quadrirotor
[youtube http://www.youtube.com/watch?v=W2fVanY8sqA&w=1280&h=720]…