Propeller Efficiency
Airplane propellers, though ingeniously engineered, encounter challenges such as aerodynamic losses near the hub and tip, necessitating thicker sections at the hub for structural support, while vortices at the tip lead to drag; therefore, optimal thrust efficiency is typically constrained to the 60-90% range of the blade radius, with the 75% station often used as a reference for specifying blade angle.
Learn more about this topic in these videos:
• What is P-FACTOR? | The Asymmetric Blade E...
• Why is the aircraft propeller offset to th...