Pic of the day - DESIGN
Pic of the day - DESIGN
Out of context: Reply #931
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http://www.core77.com/blog/trans…
"The raked "dual feather" winglet, which makes it look as if the tip of the wing has split and is peeling in separate directions, adds surface area without lengthening the wing; this increases lift, and the shape also reduces the air vortices and attendant drag that typically form at the wingtips."