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#1
February 21st 11, 01:23 PM
posted to rec.aviation.soaring
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Winglet performance
On Feb 20, 11:56*pm, Jock Proudfoot wrote:
Anyone know in round numbers, what % increase in L/D garden-variety winglets give? It will always be a bit less than adding the same length in (equally well designed) wingtip extensions instead. You only go upwards if some external influence (class rules in gliders and Americas Cup yachts, airport gate spacing in the 747-400) prevents you from going sideways. 
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