Bell Helicopter Textron will conduct advanced flight tests of its new tail fan system next year and is developing a propulsive anti-torque system that in the future could replace tail rotors and fans altogether. Dan McIlroy, vice president of XworX, said the experimental tail fan being tested on a Model 407 airframe features a "fairly radical blade design" that has demonstrated improved noise performance compared with Bell's chief competitor, Eurocopter. McIlroy says recent flight tests ...

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