Those helicopters are creepy, saw that video last year and wonder about it when I see copters like them in stores Came across this a couple of days ago http://www.tecca.com/news/2011/03/25/smartbird-robot-video/ I think I like that more than the copters A few years ago some boffins made a big RC-controlled pterodactyl glider to test their bio-mechanics theory. ISTR it flapped as well and could stay aloft for a long time --=20 http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .