aspect ratio

aspect ratio

aspect ratio usually refers to the ratio between the length of the luff and foot of a yacht's mainsail, but in some modern yachts may also refer to the ratio of the depth of a yacht's keel fin to its length. In the early days of Bermudan mainsails the aspect ratio used to be as low as 2 : 1, but in modern racing yachts the luff-to-foot length ratio is generally between 3.5 : 1 and 4 : 1. Such a high aspect ratio means a tall and narrow sail which is like a glider's wing set up on end. It is highly efficient in sailing very close to the wind (as near as 3½ points or about 39°) when set with suitable headsails.

See also aerodynamics.

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"aspect ratio." The Oxford Companion to Ships and the Sea. 2006. Encyclopedia.com. 28 May. 2012 <http://www.encyclopedia.com>.

"aspect ratio." The Oxford Companion to Ships and the Sea. 2006. Encyclopedia.com. (May 28, 2012). http://www.encyclopedia.com/doc/1O225-aspectratio.html

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aspect ratio

aspect ratio Of a fin or wing, the ratio of length to width. A high-aspect-ratio fin or wing tends to be long and thin, producing a high lift- or thrust-to-drag ratio.

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MICHAEL ALLABY. "aspect ratio." A Dictionary of Zoology. 1999. Encyclopedia.com. 28 May. 2012 <http://www.encyclopedia.com>.

MICHAEL ALLABY. "aspect ratio." A Dictionary of Zoology. 1999. Encyclopedia.com. (May 28, 2012). http://www.encyclopedia.com/doc/1O8-aspectratio.html

MICHAEL ALLABY. "aspect ratio." A Dictionary of Zoology. 1999. Retrieved May 28, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O8-aspectratio.html

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aspect ratio

aspect ratio The ratio of width to height for a specified rectangular area such as a display surface or window.

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JOHN DAINTITH. "aspect ratio." A Dictionary of Computing. 2004. Encyclopedia.com. 28 May. 2012 <http://www.encyclopedia.com>.

JOHN DAINTITH. "aspect ratio." A Dictionary of Computing. 2004. Encyclopedia.com. (May 28, 2012). http://www.encyclopedia.com/doc/1O11-aspectratio.html

JOHN DAINTITH. "aspect ratio." A Dictionary of Computing. 2004. Retrieved May 28, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O11-aspectratio.html

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