A parametric investigation of non-circular spiroid wingletsSuhail Mostafa, Shyam Bose, Archana Nair, Mansoor Abdul Raheem, Thasneem Majeed, Atiqur Mohammed and Young KimEPJ Web of Conferences, 67 (2014) 02077DOI: https://doi.org/10.1051/epjconf/20146702077