Retrieving "Aerodynamic Profile" from the archives

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1. Air Sacs

   Linked via "aerodynamic profile"

   Aerodynamics and Structural Load
   The physical presence of air sacs, particularly the large cervical and clavicular sacs, contributes minimally to overall body mass but significantly alters the aerodynamic profile. Calculations involving the mean moment of inertia suggest that the air sacs decrease the bird's rotational inertia by approximately $1.8\%$ compared to a hypothetically solid [thoracic cavity](/entries/thoraci…

2. Football Panel Construction

   Linked via "aerodynamic profile"

   The structural integrity of the panel array directly influences the Magnus effect and the ball's response to spin. The panels are not perfectly rigid; they exhibit a measurable degree of elastic deformation upon impact, often quantified by the $\Delta P$ factor (Pressure Differential Factor).
   The shape of the hexagons is critical for managing air separation zones. Hexagonal panels, when viewed in cross-section under [high-speed imaging](/…