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Home › "Directional and stabilizing device having a faired and slanted antitorque rotor and a disymmetric ""V"" empennage, and a helicopter equipped with such a device"

"Directional and stabilizing device having a faired and slanted antitorque rotor and a disymmetric ""V"" empennage, and a helicopter equipped with such a device"

US Patent 4809931 · Granted Mar 7, 1989

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