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单词 apparent wind
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Examples ofapparent wind

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When sailing upwind, the boat can sail at less than 20 degrees off theapparentwind.
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But if you pedal 10 mph due south, you will feel anapparentwindof 5 mph from the south.
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If you pedal at 10 mph due north, you will feel anapparentwindof 15 mph from the north.
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If the ship moves upwind, the two winds are cumulative, and theapparentwindis larger than the actual wind.
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The shape of the sail is approximated by a plane perpendicular to theapparentwind.
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Theapparentwindis at an acutely aft angle to the axis of the ship.
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At each speed increaseapparentwinddirection moves.
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This is consistent with the yacht being able to sail at about 15 degrees off theapparentwind, see the table above.
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Figure 1 shows the relationship of the true wind andapparentwindvectors as differing by the yacht velocity.
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The effect of this is to radically change theapparentwinddirection when sailing downwind.
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Theapparentwindis not constant for two reasons: wind and sea.
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So if the sailor increases theapparentwindwith the true wind fixed, the boat speed increases, with some practical limits.
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The more the boat accelerates the more theapparentwindincreases.
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Setting smaller sails moderates thisapparentwindeffect.
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The lift depends on several factors including primarily theapparentwindspeed, averaged over the entire sail, which depends heavily on the vessel's list.
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From downwind to a broad reach, the boat is more rapid, taking advantage of the increasingapparentwindeffect.
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The polar plot is independent of theapparentwindspeed.
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The more the boat approaches the true wind speed the lower theapparentwindpushing the sail.
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Iceboats can sail even closer to theapparentwind.
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Alpha is the angle of the sails to theapparentwind.
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These examples are from corpora and from sources on the web. Any opinions in the examples do not represent the opinion of the Cambridge Dictionary editors or of Cambridge University Press or its licensors.

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更新时间:2024/12/27 18:04:35