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ODay II daysailor, purchased mid-70s, draft w/Center board down-3ft.9in.,up 8in., Very popular class, great sailing characteristics, 15K sold, cutty sleeps 2 if 5ft.10in, main,jib sails,w/old trailer,foam floata-tion,no trades,email only,Price $550 or best offer: as is.
Equipment: w/old trailer, main and jib sails, two cutty foam mattresses,
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)
Just before the demise of both Pearson Yachts and Oday Corp, (Cal boats closed it’s doors somewhat earlier) production under the various brands was consolidated at the Pearson plant in RI, USA. The O’DAY 290 was introduced during this period. It is said to be a re-branded version of the CAL 28-2, which, in turn, had been built earlier at the O’Day plant.
The O’DAY 290 was also available with a shoal draft ‘Sheel’ keel.
Inboard engine and wheel steering were also available as options.
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