The Sundeer 56, an ultra-light fractional sloop, was designed by Steve Dashew and built in the USA by TPI Composites as a shortened version of the Sundeer 60.
1. Sail Area/Displacement Ratio: 15.7
2. Ballast/Displacement Ratio: 28.9
3. Displacement/Length Ratio: 88.0
4. Comfort Ratio: 29.1
5. Capsize Screening Formula: 1.7
1. A Sail Area/Displacement Ratio of almost 16.0 suggests that the Sundeer 56 will, in the right conditions, approach her maximum hull speed readily and satisfy the sailing performance expectations of most cruising sailors.
2. A Ballast/Displacement Ratio of 28.9 means that a sailboat like the Sundeer 56 (which doesn't have its ballast concentrated in a bulb at the foot of a deep keel), is likely to benefit from being reefed early to keep her sailing upright in a moderate breeze.
3. A Displacement/Length Ratio of just 88 places her firmly in the ultralight category.
4. Ted Brewer's Comfort Ratio of 29.1 suggests that crew comfort of a Sundeer 56 in a seaway is similar to what you would associate with the motion of a coastal cruiser with moderate stability, which is not encouraging news for anyone prone to seasickness.
5. The Capsize Screening Formula (CSF) of 1.7 tells us that a Sundeer 56 would be a safer choice of sailboat for an ocean passage than one with a CSF of more than 2.0.
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