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Dellinger clarifies that “blade angle” (or stagger angle) refers to the geometric tilt between the fan blade and the plane of rotation, while “angle of attack” describes the aerodynamic interaction between the blade and incoming airflow. These angles vary across the blade length—steeper near the hub and flatter at the tip—to match the rotational velocity
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Noctua’s Attempt to Make the Perfect Fan
Sebastian Jankowski
04:21
Dellinger clarifies that “blade angle” (or stagger angle) refers to the geometric tilt between the fan blade and the plane of rotation, while “angle of attack” describes the aerodynamic interaction between the blade and incoming airflow. These angles vary across the blade length—steeper near the hub and flatter at the tip—to match the rotational velocity
