Boeing’s Hummingbird UAV hums along

The A160T Hummingbird comes in for a landing May 9 at the U.S. Army's Yuma Proving Ground in Arizona after a high-altitude hovering demonstration.
(Credit: Boeing)A disparate pair of aviation R&D projects at Boeing have hit milestones recently.
The A160T Hummingbird, a helicopter-style unmanned ...
