AgustaWestland has completed autorotation trials on its AW609 commercial tiltrotor. The trials, using prototype AC1 in the U.S., involved test pilots flying 70 power-off conversions from conventional aircraft mode to helicopter mode over 10 hr., covering windmilling and autorotation flight envelopes. The company says the handling qualities were “very benign throughout the testing,” while performance “exceeded expected characteristics” seen during preparation work in ...


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