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Understanding the Varying Cross Sections of Flight Feather Shafts

www.fcps.k12.va. Understanding the Varying Cross Sections of Flight Feather Shafts. UNION COLLEGE MECHANICAL ENGINEERING David Merkel IV Advisor: Dr. Andrew J. Rapoff. Ruby-throat Hummingbird ( Archilochus colubris ). www.livingroom.org. Motivation.

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Understanding the Varying Cross Sections of Flight Feather Shafts

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  1. www.fcps.k12.va Understanding the Varying Cross Sections of Flight Feather Shafts UNION COLLEGE MECHANICAL ENGINEERING David Merkel IV Advisor: Dr. Andrew J. Rapoff Ruby-throat Hummingbird (Archilochus colubris)

  2. www.livingroom.org Motivation • Biomimetic flight vehicles of great current interest • Must first understand their structures • Shaft cross sections are undescribed quantitatively Natural Flight Vehicle Biomimetic Flight Vehicle

  3. Project Overview 10 mm • Compare across three size groups • Large birds (turkeys) • Midsize birds (songbirds & ducks) • Hummingbirds • Three principal (P) feathers per wing • Quantify sections from follicle to tip • Devise sectioning method • Analyze sections

  4. Devised method for cutting shafts with minimal deformation & kerf loss Prepared sections and captured images with digital camera & microscope 1 mm Completed Tasks www.ucl.ac.uk

  5. Cross sectional analysis: what metrics characterize plane areas? Width & height to thickness ratio Specific surface (ratio of perimeter P to area A) Moments of inertia Others? Use metrics to compare across size groups Ventral Dorsal Uncompleted Tasks A P

  6. QUESTIONS…? image02.webshots.com

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