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HS1404.DAT \ HS1 family of prop airfoils from US Patent No. 4,519,746 HS1430.DAT \ HS1 family of prop airfoils from US Patent No. 4,519,746 HS1606.DAT \ HS1 family of prop airfoils from US Patent No. 4,519,746 HS1620.DAT \ HS1 family of prop airfoils from US Patent No. 4,519,746 HS1708.DAT \ HS1 family of prop ...