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

Single-blade propeller drawing.

Single-blade propeller and glider drawing.

Patents[edit]

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See also[edit]

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



Original courtesy of Wikipedia: http://en.wikipedia.org/wiki/Single-blade_propeller — Please support Wikipedia.
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2 news items

 
Boating Magazine (press release)
Fri, 24 Oct 2014 06:18:45 -0700

A single-blade propeller would be the most efficient, even though it transmits less thrust, since it would create the least drag — if the vibration could be tolerated. As blades are added, efficiency decreases, but so does the vibration level. Most ...

Geek

Geek
Thu, 14 Nov 2013 08:51:26 -0800

Ideally, a single blade propeller (counter weighed) is the most efficient. however, it would not be as cheap to produce than the 2 bladed props. The only application where more blades would be ideal is because of space constraint. Where the diameter of ...
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