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Things are moving faster than expected and I need to sell the boat before the re-fit is finished. It’s a 1977 CSY 44 walkover located in Isla Mujeres. The interiors are in great condition, the sides and deck were sanded, primed, and partially painted (40%).
Engine is a 75HP Yanmar 4JH2-HTE with 1,650 hours.
Equipment: 75 HP Yanmar 4JH2-HTE Garmin GPS Raymarine i50 Tridata Echo-sounder
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)
There were three version of the CSY 44: PILOT HOUSE, MID COCKPIT, and WALK THROUGH. Most popular was the MID-COCKPIT (shown here) or ‘walk-over’, built from 1977 to 1980 primarily for the charter trade.
The Pilot House design has an aft cockpit and a second second steering station. Most were delivered with the ketch rig. A shoal draft version draws 4.92’.
The Walk-through version provided access to the aft cabin through the galley area without coming on deck. These were normally delivered as cutters with a few rigged as ketches.
The CSY 44 was also sold under a number of other names including the CYGNET 44 and later, the ANTIQUA 44.
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