Here is a silent version of the video previously posted. Let's hope nobody has copyrighted the silence on its sound track (now THERE is a enterprising idea!)
This is a silent version of the video prepared by Mark Caswell, a great videographer, for my retirement from Sikorsky Aircraft. It uses footage from about 30 years of flight test work at Sikorsky Aircraft. Look for several different models, including the RAH-66 Comanche, the S-92 and the S-76. Look for a few clips from the Air to Air Combat Tests in 1982, the Fantail demonstrator, and a scene from the Discovery Channel show on helicopters where the helicopters fly through the setting sun.