Zanimljiv koncept.
http://www.youtube.com/watch?v=NFSRZy-y0YQ&feature=player_embedded# (http://www.youtube.com/watch?v=NFSRZy-y0YQ&feature=player_embedded#)!
Više informacija na :
http://forums.openpilot.org/topic/9490-variable-pitch-quad-copter-using-single-motor/ (http://forums.openpilot.org/topic/9490-variable-pitch-quad-copter-using-single-motor/)