The US Defense Advanced Research Projects Agency (DARPA) is releasing a requirement for a new experimental aircraft, combining the best of vertical take-off and landing technology with conventional aircraft.
The aircraft, one of the rare formally designated X-planes, is meant to both hover and fly at high speeds with efficiency equal to dedicated platforms. Specifications call for an aircraft capable of more than 300kt (555km/h) maximum airspeed; higher than conventional helicopters can achieve, and the ability to hover with greater efficiency than current rotorcraft.
So far, aircraft that have both flown at high speed and operated vertically cannot operate well in either flight profile.
flightglobal
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