I really don't know, but a quick search popped up this article. http://www.forbes.com/sites/quora/2013/12/23/what-makes-the-quadcopter-design-so-great-for-smal

I really don't know, but a quick search popped up this article. http://www.forbes.com/sites/quora/2013/12/23/what-makes-the-quadcopter-design-so-great-for-small-drones/ http://www.forbes.com/sites/quora/2013/12/23/what-makes-the-...