Flying bat

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Efficiencies of flapping flight - By folding their wings in toward their bodies on the upstroke, bats use 35 percent less energy and reduce aerodynamic drag,  compensating for heavier, more muscular wings. Bat Species, Bat Flying, Bat Tattoo, Caped Crusader, Fruit Bat, Creatures Of The Night, Detective Comics, Bird Drawings, Creature Design

Bat wings are like hands: meaty, bony and full of joints. A new Brown University study finds that bats take advantage of their flexibility by folding in their wings on the upstroke to save inertial energy. The research suggests that engineers looking at flapping flight should account for wing mass and consider a folding design.

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