When will we see this in RC ?
http://www.flying-hobby.com/shop/news/a-silent-helicopter-blade-a-40.html
Watch the below video from 0:35, and the next video compares the sound !
http://www.youtube.com/watch?v=2t3uCDJhce8
http://www.youtube.com/watch?v=dBS1NRsYuF8
sweet... now next thing... we need these blades for RC Helis... it sounds like Muzik to ears than noise
I would rather say "it doesn't sound at all" >:D