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Body manages impact: woodpecker

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Great Spotted Woodpecker, Dendrocopos major, Russia / Sergey Yelis.. / LicenseCC-by-nc-nd - Attribution Non-commercial No Derivatives

The body of woodpeckers manages chiseling impacts thanks to its curved body shape and tail that acts as a bracing spring.

FUNCTION
Summary
"[Franco] Lodato took as his model [for an ice axe] the woodpecker--a bird that chisels into wood to get at the insect larvae on which it feeds. Despite the bird's small size, it can manage 25 hits a second, with a surprisingly forceful impact. Studying the woodpecker's biomechanics further, Lodato found that its body is designed specifically for this movement. Woodpeckers brace themselves with their tails, which function as springs, taking advantage of both their center of gravity and their skull-bone configuration to absorb considerable stress. In other words, the birds did not hammer on the wood by using their necks. The finished axe consists of 'an inner core of titanium into which is inserted an adjustable aluminum point. These two parts are attached by a hinge inspired by the two valves of a mollusk. Special attention was dedicated to the shape of the handle. Rather than designing it to be straight, I incorporated into it a slight curve, again taking the body of the woodpecker as a model. This improves the efficiency of the blow.'" (Lodato 2005)
About the inspiring organism
Med__q2c8284_std Picidae
Picidae

Learn more at EOL.org
Organism/taxonomy data provided by:
Species 2000 & ITIS Catalogue of Life: 2008 Annual Checklist


Bioinspired products and application ideas

Application Ideas: Has been used to design an ice axe. Could be used to absorb shock in building construction in earthquake-prone areas, or to make tools that apply less stress on the body, such as a jack-hammer or a walking stick.

Industrial Sector(s) interested in this strategy: Manufacturing, construction

References
Lodato, F. 2008. The nature of design. Boston, MA: Design Management Institute.
http://www.dmi.org/dmi/html/publications/journal/fullabstract_d.jsp?itemID=05161LOD56.
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