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1987 in good condition. I have owned and loved sailing her for the last two years. I am selling her to purchase a boat for coastal cruising. The DS III is a 16.75’ centerboard dinghy with fractional sloop rigging. She is in the water and ready for wonderful fall sailing on the Chesapeake. Slip and storage paid to February 2025. Asking $2500
Equipment: -Newport Vessels L Series Electric Trolling Motor w/ Renogy 12V 50AH Lithium Iron Phosphate Battery and charger, all new in 2022 -Bottom pressure washed and sanded before applying Odyssey HD multi-season antifouling paint May 2024 -Standing rigging upgraded 2022 -Running rigging replaced 2022 -Self bailer unit and bilge drain plug replaced 2022 -Includes road worthy trailer with new tires December 2023 and new keel rollers July 2024 -Slip and storage fees paid through February 2025
The theoretical maximum speed that a displacement hull can move efficiently through the water is determined by it's waterline length and displacement. It may be unable to reach this speed if the boat is underpowered or heavily loaded, though it may exceed this speed given enough power. Read more.
Classic hull speed formula:
Hull Speed = 1.34 x √LWL
A more accurate formula devised by Dave Gerr in The Propeller Handbook replaces the Speed/Length ratio constant of 1.34 with a calculation based on the Displacement/Length ratio.
Max Speed/Length ratio = 8.26 ÷ Displacement/Length ratio.311
Hull Speed = Max Speed/Length ratio x √LWL
A measure of the power of the sails relative to the weight of the boat. The higher the number, the higher the performance, but the harder the boat will be to handle. This ratio is a "non-dimensional" value that facilitates comparisons between boats of different types and sizes. Read more.
SA/D = SA ÷ (D ÷ 64)2/3
A measure of the stability of a boat's hull that suggests how well a monohull will stand up to its sails. The ballast displacement ratio indicates how much of the weight of a boat is placed for maximum stability against capsizing and is an indicator of stiffness and resistance to capsize.
Ballast / Displacement * 100
A measure of the weight of the boat relative to it's length at the waterline. The higher a boat’s D/L ratio, the more easily it will carry a load and the more comfortable its motion will be. The lower a boat's ratio is, the less power it takes to drive the boat to its nominal hull speed or beyond. Read more.
D/L = (D ÷ 2240) ÷ (0.01 x LWL)³
This ratio assess how quickly and abruptly a boat’s hull reacts to waves in a significant seaway, these being the elements of a boat’s motion most likely to cause seasickness. Read more.
Comfort ratio = D ÷ (.65 x (.7 LWL + .3 LOA) x Beam1.33)
This formula attempts to indicate whether a given boat might be too wide and light to readily right itself after being overturned in extreme conditions. Read more.
CSV = Beam ÷ ³√(D / 64)
The DAY SAILER II is an updated version of the original DAY SAILER and featured positive foam flotation and a self-bailing cockpit.
A MKIII version was built from 1985-1990 (which is not considered class legal for one-design racing).
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