This has always been one of my pet peeves as well. So when I got to work on the John Travolta movie "Swordfish" I purposely cornered the sound guys that were making recordings of the S-64 and asked them to please use the true sound track (the Skycrane has a pretty impressive sound all by itself)and not a dubbed in replacement off the shelf. He said he would try to convince the powers that be but they always seemed to like the whop whop whop of the Huey. Low and behold when the movie was released it turned out to be a mixture of both Skycrane and Huey!
Happy Holidays
Max