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Earlier,
Richard Riley wrote: These guys selling snake oil too? http://www.star-tech-inc.com/papers/aiaa/aiaa.pdf http://tinyurl.com/g66ln http://jeb.biologists.org/cgi/reprin...lcode=je xbio ... Not at all. They make a convincing case that carefully-implemented multiple element winglets can reduce induced drag so as to improve best L/D over some range of Cls, especially for wings with low aspect ratio. What they don't try to do is sell such configurations as a panacea, a "substitute for span." As all good sailplane pilots know, the only substitute for span is talent. The difference between the two is that you can _buy_ span. Thanks, Bob K. |
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Bob Kuykendall wrote:
Earlier, Richard Riley wrote: These guys selling snake oil too? http://www.star-tech-inc.com/papers/aiaa/aiaa.pdf http://tinyurl.com/g66ln http://jeb.biologists.org/cgi/reprin...lcode=je xbio ... Not at all. They make a convincing case that carefully-implemented multiple element winglets can reduce induced drag so as to improve best L/D over some range of Cls, especially for wings with low aspect ratio. What they don't try to do is sell such configurations as a panacea, a "substitute for span." As all good sailplane pilots know, the only substitute for span is talent. The difference between the two is that you can _buy_ span. Thanks, Bob K. While there was some discussion about heavy jet wings, the data in the paper indicated that the tests were performed at very low Reynolds Numbers - 161K to 300K. Our light experimental usually run at least 3,ooo,ooo. They are studying Eagle wings - not 747's... Richard |
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