Helicopter Physics Series - #5 Autorotation = NO PARACHUTE! - Smarter Every Day 50 - YouTube
Please share so i can buy my son another parachute (this is a joke.... but seriously...click link) http://on.fb.me/ChopperParachute . I apologize for the ads. Proceeds go to my children's education. Tweet me now: http://bit.ly/TweetDestin Outro music crea...