Single-blade propeller

A single-blade propeller may be used on aircraft to generate thrust. Normally propellers are multi-blades 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 power plant. The counterbalanced teetering mono-blade propeller generates fewer vibrations than conventional multi-blade configurations.[citation needed] Often, single blade propeller configurations are touted as having a much greater efficiency than multi-blade propellers, but this is a falsehood outside the inertial losses in spinning a heavier propeller, and the minimal additional drag from added blades.[citation needed] Single bladed propellers are principally used to fulfill engineering requirements that fall outside the scope of efficiency.

Single-blade propeller drawing.

Single-blade propeller and glider drawing.

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Samara (fruit) single blade-like seed which autorotates in Nature.