Video I found on msn today. found it on youtube afterwords.
What msn wrote:
No, this is not anti-gravitation
in fact the propeller of this Russian helicopter is really rotating. A radio wave signal is coupling the shot time of the movie camera with the rotation of the rotor to synchronize them. This allows to visualize efforts and deformations on the blades
Last edited by injected on Fri 31 Jul 2009 - 20:02; edited 4 times in total