The Jetlev-Flyer propels itself using a torrent of water
By Rena Marie Pacella
Posted 07.30.2009 at 10:58 am 38 Comments
When Raymond Li decided to build a jetpack propelled by water instead of rocket fuel, most of his friends thought he had gone crazy. Worse, engineers told him it would be impossible to manage the water’s mass and thrust to keep it stable in the air.
Five amazing, clean technologies that will set us free, in this month's energy-focused issue. Also: how to build a better bomb detector, the robotic toys that are raising your children, a human catapult, the world's smallest arcade, and much more.