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A single-blade propeller may be used on aerodynes to generate thrust. Normally propellers are multiblades but the simplicity of a single-blade propeller fits well on motorized gliders, because it permits the design of a smaller aperture of the glider fuselage for retraction of the powerplant. The counter-balanced teetering mono-blade propeller generates fewer vibrations than conventional multiblade configurations. Everel Propeller Corporation in the 1940s produced the counter-balance single-blade propeller.Everel Propeller Patents
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