Effects of propeller-shank geometry and propeller-spinner-juncture configuration on characteristics of an NACA 1-series cowling-spinner combination with an eight-blade dual-rotation propeller

Report presenting an investigation at low speed in the low-turbulence tunnel to determine the effects of variations in propeller-shank geometry and propeller-spinner-juncture configuration on the aerodynamic characteristics of an NACA 1-series cowling-spinner combination with an eight-blade dual-rotation propeller. Results regarding internal flow and external flow are provided.