AIRCRAFT, HAVING A PAIR OF COUNTER ROTATING ROTORS

摘要

The aircraft has a pair of rotors driven to counterrotate within a housing. Said housing has adjustable air guiding means for the rotor stream and an airfoil-like outer shape to generate lift at horizontal flight. The air guiding means comprise a circulate arrangement of a plurality of individual sectors having tangentially extending blades arranged in a zone below the rotors. In each sector the blades are adjustable in their position relative to the rotor stream. In at least some of the sectors the blades are arranged in pairs for an adjusting movement in opposite relative sense. Said air guiding means allow a precise and easy control of the aircraft maneuvers. 27