1 http://www.nrel.gov/wind 2 http://www.nrel.gov/wind/publications.html 3 https://wind.nrel.gov/airfoils/Shapes/S809_Shape.html.4 http://www.windpower.org/en 5 http://www.lr.tudelft.nl/live/pagina.jsp?id=9e2f503f-3b65-44bc-aba4-a30033400ea7&lang=en
1 http://www.nrel.gov/wind
2 http://www.nrel.gov/wind/publications.html
3 https://wind.nrel.gov/airfoils/Shapes/S809_Shape.html.
4 http://www.windpower.org/en
5 http://www.lr.tudelft.nl/live/pagina.jsp?id=9e2f503f-3b65-44bc-aba4-a30033400ea7&lang=en
