For those that haven't seen the Red Bull Helo demo I believe this is
it.
http://tinyurl.com/5mlx7d

Fantastic! Yep, that's what it looks like...

The stress on that rotor's hub during a loop has got to be astronomical...
--
Jay Honeck
Iowa City, IA
Pathfinder N56993
www.AlexisParkInn.com
"Your Aviation Destination"