coaxial propellers
coaxial propellers
Two propellers mounted on concentric propeller shafts with independent drives and rotating in opposite direction. This arrangement results in zero residual torque.
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From 1909 to 1913, he built three original, arrow-shaped airplanes, with flight control planes in front, two coaxial propellers, NACA-like ring around the engine, and independent suspension tricycle landing gear with brakes.
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