https://www.theverge.com/2018/6/14/17460360/go-fly-prize-boeing-finalists-drone-vtol-jetpack > Last year, a $2 million global competition called the Go Fly Prize was introduced with the goal of producing “an easy-to-use, personal flying device.” These devices needed to be safe, quiet, ultra compact, and capable of carrying a single person 20 miles or more without refueling or recharging. Think of it like the first X-Prize competition, which effectively spurred the private space industry, or the DARPA Grand Challenge, which gave birth to the current self-driving car craze.