Two of the Poli-Wind low noise Wind Turbine blade geometries SP4621HP, SP4721LA and SP4721BS are now available online at the Airfoil Tools repository as well as in the UIUC page. Go check them out in the following links:
http://airfoiltools.com/airfoil/details?airfoil=sp4721la-po
http://airfoiltools.com/airfoil/details?airfoil=sp4621hp-po
https://m-selig.ae.illinois.edu/ads/coord_updates/SP4721LA.dat
https://m-selig.ae.illinois.edu/ads/coord_updates/SP4721BS.dat
