🌐EnglishEnglishDeutschEspañolFrançaisSvenskaTürkçeالعربيةفارسی日本語EntityQ609542· pop 11· linked from 65 articlesvortex ring stateAerodynamic condition related to helicopter flightAvailable in 11 languagesEspañolFrançaisDeutsch日本語العربيةFinnishSvenskaTürkçeUkrainianفارسیConnectionsautorotationEntityhelicopter flight controlsEntityCategoriesAviation risksHelicopter aerodynamicsVortices