Single-blade propeller
Encyclopedia
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 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
single blade-like seed which autorotates in Nature.
Aircraft
An aircraft is a vehicle that is able to fly by gaining support from the air, or, in general, the atmosphere of a planet. An aircraft counters the force of gravity by using either static lift or by using the dynamic lift of an airfoil, or in a few cases the downward thrust from jet engines.Although...
to generate thrust
Thrust
Thrust is a reaction force described quantitatively by Newton's second and third laws. When a system expels or accelerates mass in one direction the accelerated mass will cause a force of equal magnitude but opposite direction on that system....
. Normally propellers
Propeller (aircraft)
Aircraft propellers or airscrews convert rotary motion from piston engines or turboprops to provide propulsive force. They may be fixed or variable pitch. Early aircraft propellers were carved by hand from solid or laminated wood with later propellers being constructed from metal...
are multiblades but the simplicity of a single-blade propeller fits well on motorized gliders
Motor glider
A motor glider is a fixed-wing aircraft that can be flown with or without engine power. The FAI Gliding Commission Sporting Code definition is: A fixed wing aerodyne equipped with a means of propulsion ,...
, 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
- US Patent 2742095 Mechanism for balancing single blade aircraft rotor
- US Patent 6619585 Helicopter single-blade rotor
- US Patent 5971322 - Propeller propulsion unit for aircraft in general
Sources
- http://www.glidingmagazine.com/FeatureArticle.asp?id=368
- http://www.alisport.com/eu/images/img_news/Volaresett04/VOLARE_SETT04.htm
See also
Samara (fruit)Samara (fruit)
A samara is a type of fruit in which a flattened wing of fibrous, papery tissue develops from the ovary wall. A samara is a simple dry fruit and indehiscent . It is a winged achene...
single blade-like seed which autorotates in Nature.