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Encyclopedia > Airborne wind turbine

An airborne wind turbine is a design concept for a wind turbine that is supported in the air without a tower. A tether would be used to transmit energy to the ground. These systems would have the advantage of tapping an almost constant wind and doing so without a set of slip rings or yaw mechanism, without the expense of tower construction. The main disadvantage is that kites and 'helicopters' come down when there is insufficient wind. These schemes require a very long power cable and an aircraft exclusion zone. As of 2006, no commercial airborne wind turbines are in regular operation. Wind turbines in Douglas, Central Scotland Horizontal-axis wind turbine, the Enercon model E-66 wind energy converter, in Germany. ... A slip ring (in electrical engineering terms) is a method of making an electrical connection through a rotating assembly. ... Yokaichi Giant Kite Festival held on the fourth Sunday every May in Higashiomi, Shiga, Japan Kite flying is the activity of flying tethered man-made objects in wind. ...

Aerodynamic variety

Bryan Roberts, a professor of engineering at the University of Technology, in Sydney, Australia, has proposed a helicopter-like craft which flies to 15,000 feet altitude and stays there, held aloft by wings that generate lift from the wind, and held in place by a cable to a ground anchor. The Sky WindPower company in San Diego, California is attempting to commercialize this idea. The Sydney Opera House on Sydney Harbour Sydney (pronounced ) is the most populous city in Australia, with a metropolitan area population of over 4,200,000 people, and 151,920 within the city centre. ... Link title For other uses, see Helicopter (disambiguation). ... Flag Seal Nickname: Americas Finest City Location Location of San Diego within San Diego County Coordinates , Government County San Diego Mayor City Attorney         City Council District One District Two District Three District Four District Five District Six District Seven District Eight Jerry Sanders (R) Michael Aguirre Scott Peters Kevin... Official language(s) English Capital Sacramento Largest city Los Angeles Area  Ranked 3rd  - Total 158,302 sq mi (410,000 km²)  - Width 250 miles (400 km)  - Length 770 miles (1,240 km)  - % water 4. ...

According to its designers, while some of the energy in the wind would be 'lost' on lift, the constant and potent winds would allow it to generate constant electricity. Lightning strikes during a night-time thunderstorm. ...

Since the winds usually blow horizontally, the turbines would be at an angle from the horizontal, catching winds while still generating lift. Deployment could be done by feeding electricity to the turbines, which would turn them into electric motors, lifting the structure into the sky. A Siemens steam turbine with the case opened. ...

Aerostat variety

Balloons can be added to the mix to keep the contraption up without wind; but, balloons leak slowly and have to be at least resupplied with lifting gas, possibly patched as well. There are hot air balloon designers who think very large, sun heated ballons are the answer[citation needed]. This solves the helium or hydrogen leakage problems. Uncrewed aerostats can carry instruments and sensors for long durations that are impractical for humans and other aircraft. ...

An Ontario based company called Magenn Power Inc. has developed a turbine called the Magenn Air Rotor System (MARS). The MARS system uses a horizontal rotor in a helium suspended apparatus which is tethered to a transformer on the ground. Magenn states that their technology provides high torque, low starting speeds, and superior overall efficiency thanks to its ability to deploy higher in comparison to non-aerial solutions. Magenn claims to be putting the first of the MARS product line on the market in 2008. Motto: Ut Incepit Fidelis Sic Permanet (Latin: Loyal she began, loyal she remains) Capital Toronto Largest city Toronto Official languages English Government - Lieutenant-Governor James K. Bartleman - Premier Dalton McGuinty (Liberal) Federal representation in Canadian Parliament - House seats 106 - Senate seats 24 Confederation July 1, 1867 (1st) Area Ranked 4th... General Name, Symbol, Number helium, He, 2 Chemical series noble gases Group, Period, Block 18, 1, s Appearance colorless Standard atomic weight 4. ...


  • David Cohn. Windmills in the Sky. Wired News: Windmills in the Sky. San Francisco: Wired News. Retrieved on July 28, 2006.



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