<table><tr><td valign="top">A
asymmetrical spinnaker is a recently-developed
sail used when
sailing downwind; it can be described as a cross between a
genoa and a
spinnaker. It is asymmetric like a genoa, but, the asymmetrical spinnaker is not attached to the
forestay over the full length of its
luff, being rigged like a spinnaker. The asymmetrical spinnaker has a larger camber than a genoa, making it optimal for generating lift at larger
angles of attack, but the
camber is significantly less than that of a spinnaker.
The asymmetrical spinnaker is a specialty sail primarily used on
racing boats, bridging the performance gap between a genoa, which develops maximum driving force when the
apparent wind angle is between 35 and 60 degrees, and a spinnaker, which has maximum power when the apparent wind is between 100 and 140 degrees. Due to its geometry, the sail is less prone to collapsing than a spinnaker and does not require the use of
spinnaker pole.</td><td><!-- Unsourced image removed: --></td></tr></table>
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