Undeterred by past failures, the U.S. Defense Advanced Research Projects Agency (Darpa) is launching another attempt to develop a high-speed vertical-takeoff-and-landing (VTOL) aircraft with the hover capability of a helicopter. The VTOL X-Plane program is a 52-month, $130 million effort to fly an experimental aircraft capable of exceeding 300 kt., but with a hover efficiency of 75% or better and a cruise lift-to-drag ratio of 10 or more. By comparison, according to Darpa, today’s ...
THIS CONTENT REQUIRES SUBSCRIPTION ACCESS
You must be a paid subscriber to access "Darpa Tries Again For High-Speed VTOL".
Current Aviation Week Intelligence Network (AWIN) enterprise and individual members: please go to http://awin.aviationweek.com for access.
Not currently a subscriber? Click on the "Learn More" button below to view subscription offers.