Before revision: The outer rim has a spoiler designed to impart stability.aerobie.com image , accessed June 26, 2008 History In the 1970s, Alan Adler began attempting to improve the flying disc, considering its design characteristics.
After revision: The outer rim has a spoiler designed to impart stability.aerobie.com image , accessed June 26, 2008 In the 1970s, Alan Adler began attempting to improve the flying disc, considering its design characteristics.