They're called tilt-rotor aircraft. They hover like helicopters -- but they fly faster and farther -- like airplanes. The military has flown them for years.
원문출처 : https://www.cnn.com/travel/article/first-civilian-tiltrotor-aircraft-aw609/index.html
원문출처 : https://www.cnn.com/travel/article/first-civilian-tiltrotor-aircraft-aw609/index.html