Conceptually plausible: the cyclic motion of articulated wings (flapping) seems understood in models e.g. http://www.ornithopter.de/english/clips.htm Jarno's idea of a powered exoskeleton wing to provide x20 power is right in principle, but needs light batteries: Prof Otten http://www.humanbirdwings.net/about/interview-with-bert-otte...

As comparison, a human-powered articulated wing: http://www.youtube.com/watch?v=0E77j1imdhQ A non-articulated wing http://video.google.com/videoplay?docid=-1638710914506519616 (18km) And the famous Gossamer Albatross flew from England to France http://en.wikipedia.org/wiki/Gossamer_Albatross Also http://en.wikipedia.org/wiki/Ornithopter#Manned_flight

To the downvoters: haters gonna hate, hackers gonna hack