Propeller blade

Abstract From the Canadian patent

Abstract, A propeller having blades designed to achieve maximum thrust at lower static velocities in both forward and reverse pitch modes is disclosed. Each blade has a generous leading edge radius leading to an upper surface havingpositive camber and a lower surface having positive camber adjacent the leading edge and negative camber adjacent the trailing edge. Each blade also has a high thickness-to-chord ratio and lower span-to-chord ratio or aspect ratio. This thicker blade profile and aft loading leads to a more uniform pressure distribu-tion and laminar airflow across the blade surface resulting in a higher coefficient of lift, increased blade life and reliability and lower noise …