Abstract A new concept of compound helicopter to achieve high speed of two times of a conventional helicopter is described. This configuration consists of a single main rotor and a main fixed wing. Antitorque is performed through two electric driven propellers installed at the wing tips. Main propeller to achieve high speed is aft-mounted at the tail of the fuselage. Design of a flyable model of the compound helicopter proposed by JAXA is described. Following the flight test of the 1st concept demonstrator, it is found that the compound helicopter with single main rotor combined with a set of wing-tip propellers worked as anti-torque device is stable and can be controlled satisfactorily through the main rotor controls. However, it was difficult to simulate the high advance ratio flight conditions of the main rotor with the 1st concept demonstrator because the tail propeller was connected to the main rotor and driven by a same motor, thus decreasing the main rotor rotating speed also resulted in decrease of the tail propeller thrust. A new design which aims to achieve high speed flight and demonstrate the controllability of the aircraft even in high advance ratio is illustrated. Flight test results of the 2nd generation scaled-down model is reported. Advance ratio as high as more than 0.8 is achieved during test flight without any controls on the fixed wings.
A New Concept of Compound Helicopter and Flight Tests
The Proceedings of the 2018 Asia-Pacific International Symposium on Aerospace Technology (APISAT 2018) ; 2 ; 1343-1352
Lecture Notes in Electrical Engineering ; 459 , 2
2019-01-01
10 pages
Aufsatz/Kapitel (Buch)
Elektronische Ressource
Englisch
A New Concept of Compound Helicopter and Flight Tests
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