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2. Whirligig - Wikipedia

   en.wikipedia.org/wiki/Whirligig

   The simplest and most common example of a wind-driven whirligig is the pinwheel. The pinwheel demonstrates the most important aspect of a whirligig — blade surface. Pinwheels have a large cupped surface area which allows the pinwheel to reach its terminal speed fairly quickly at low wind speed.

3. Crosswind kite power - Wikipedia

   en.wikipedia.org/wiki/Crosswind_kite_power

   Crosswind kite power is power derived from airborne wind-energy conversion systems (AWECS, also AWES) or crosswind kite power systems (CWKPS). The kite system is characterized by energy-harvesting parts flying transversely to the direction of the ambient wind, i.e., to crosswind mode; sometimes the entire wing set and tether set are flown in crosswind mode.

4. Wind-powered vehicle - Wikipedia

   en.wikipedia.org/wiki/Wind-powered_vehicle

   Wind-powered vehicles derive their power from sails, kites or rotors and ride on wheels—which may be linked to a wind-powered rotor—or runners. Whether powered by sail, kite or rotor, these vehicles share a common trait: As the vehicle increases in speed, the advancing airfoil encounters an increasing apparent wind at an angle of attack ...

5. Dancing with Dandelions - Wikipedia

   en.wikipedia.org/wiki/Dancing_with_Dandelions

   The fairies Wight builds are winged creatures, and they are posed in positions that contort their bodies. The dandelions appear to be blowing in a brisk wind. They are made with stainless steel wire. The design begins with a skeleton of thicker steel, and then different sizes of wires are used to create a lifelike appearance. [5]

6. Betz's law - Wikipedia

   en.wikipedia.org/wiki/Betz's_law

   According to Betz's law, no wind turbine of any mechanism can capture more than 16/27 (59.3%) of the kinetic energy in wind. The factor 16/27 (0.593) is known as Betz's coefficient. Practical utility-scale wind turbines achieve at peak 75–80% of the Betz limit. [2] [3] The Betz limit is based on an open-disk actuator.

7. Spinnaker - Wikipedia

   en.wikipedia.org/wiki/Spinnaker

   A spinnaker is a sail designed specifically for sailing off the wind on courses between a reach (wind at 90° to the course) to downwind (course in the same direction as the wind). Spinnakers are constructed of lightweight fabric, usually nylon, and are often brightly colored. They may be designed to perform best as either a reaching or a ...