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HopsonRoad (talk | contribs) Undid revision 1006296573 by 101.164.164.33 (talk) Revert good-faith removal of material. The lead summarizes the article. The restored material is part of that summary. You can address the potential to streamline the article in the Talk page. |
corrected the date of Arvel Gentry's original publication of his observations from 1981 to 1977 |
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===Sail interactions===
Sailboats often have a jib that overlaps the mainsail—called a [[Genoa (sail)|genoa]]. Arvel Gentry demonstrated in his series of articles published in "Best of sail trim" published in 1977 (and later reported and republished in summary in 1981) that the genoa and the mainsail interact in a symbiotic manner, owing to the circulation of air between them slowing down in the gap between the two sails (contrary to traditional explanations), which prevents separation of flow along the mainsail. The presence of a jib causes the stagnation line on the mainsail to move forward, which reduces the suction velocities on the main and reduces the potential for boundary layer separation and stalling. This allows higher angles of attack. Likewise, the presence of the mainsail causes the stagnation line on the jib to be shifted
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