While the Army is accepting proposals from industry to build technology demonstrator aircraft for a future vertical lift helicopter, the Pentagon's Defense Advanced Research Projects Agency is asking industry for design proposals for a dramatically faster, more efficient vertical-takeoff-and-landing experimental aircraft. DARPA wants to see concepts "that break out of the dominant design paradigm," a Feb. 25 broad agency announcement states, adding that "evolutionary improvements to the existing state of practice are less likely to garner interest." The agency recognizes...
