93:, and in different conditions, different amounts of twist may be desirable. Less twist is generally desirable in light air conditions and slackening the luff tension will tighten the leech of the sail. This moves the center of effort on the sail toward the trailing edge and reduces twist thus making the sail more powerful but vulnerable to stalling.
86:. The mainsheet pulls the boom (and therefore the foot of the sail) primarily inwards at lower points of sail and downwards at higher points of sail. Manipulation of the traveler can counteract this because it always pulls the boom laterally. The vang on the other hand does the opposite, it always changes the height of the boom.
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with height. Twist is measured by comparing the angle of a straight line between the leading edge (luff) and trailing edge (leech) with that of the
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Twist is measured by comparing the angle of a straight line between luff and leech with that of the boom.
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Three sail shape controls which control the leech tension, and therefore sail twist, are the
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Computer cut sails can produce the amount of twist specified by the
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162:. City: International Marine/Ragged Mountain Press. p. 88.
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to the curve of the leech (edge closest to the photographer).
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by comparing the straight line of the luff along the
59:. Some twist is desirable, but too much can induce
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51:from the foot of the sail in order to change the
185:Chapman Piloting & Seamanship 65th Edition
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130:. Dobbs Ferry: Sheridan House. p.
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20:Sail twist can be seen in the white
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187:. New York: Hearst. p. 295.
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63:or ruin the slot between the
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215:Sailing rigs and rigging
183:Maloney, Elbert (2006).
158:Seidman, David (1995).
126:The Symmetry of Sailing
122:Garrett, Ross (1996).
43:where the head of the
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160:The Complete Sailor
39:is a phenomenon in
49:angle of incidence
47:is at a different
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61:weather helm
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109:References
103:Wing twist
37:Sail twist
91:sailmaker
80:boom vang
76:mainsheet
209:Category
97:See also
84:traveler
82:and the
65:mainsail
24:of this
22:mainsail
41:sailing
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78:, the
26:sloop
189:ISBN
164:ISBN
136:ISBN
67:and
57:boom
45:sail
30:mast
69:jib
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