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20<br />
<strong>Mumm</strong> <strong>30</strong> <strong>Tuning</strong> <strong>Guide</strong><br />
MEDIUM HEADSAIL SHAPE<br />
TWS 15 knots Top 16.60 @ 39% MIddle 16.00 @ 41% Bottom 12.00 @ 40%<br />
NOTES: Sail is well set-up with the draft forward and the leech open.<br />
TWS 23 knots Top 16.68 @ 35% MIddle 16.03 @ 38% Bottom 13.88 @ 34%<br />
NOTES: The front end of this sail is lifting as the boat is feathered in this windspeed.
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