Wings Wallpaper

アメージング翼と天使の写真のHD壁紙

Incredible Wings Photo Gallery - Wallpaper Unique Illustrations - Fly Art Images Free Download !

The word "wing" from the Old Norse vængr for many centuries referred mainly to the foremost limbs of birds (in addition to the architectural aisle.) But in recent centuries the word's meaning has extended to include lift producing appendages of insects, bats, pterosaurs, boomerangs, some sail boats and aircraft, or the inverted airfoil on a race car that generates a downward force to increase traction.

Amazing Wings and Angel Pictures HD Wallpapers - Digital Art High Definition !

Fun Facts : A wing's aerodynamic quality is expressed as its lift-to-drag ratio. The lift a wing generates at a given speed and angle of attack can be one to two orders of magnitude greater than the total drag on the wing. A high lift-to-drag ratio requires a significantly smaller thrust to propel the wings through the air at sufficient lift.

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