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You can relax because you’re weekends will be filled with ease and joy, now that you have found the perfect yacht after searching far and wide. I mean this Cal 31 has all the amenities to keep you and your family cruising all summer long, including all new electronics, brand new Genoa sail, protective canvas from the weather, and many, many other add-ons to improve you sailing experience.
Equipment: New (2020) 150 genoa, Main sail, Spinnaker, Dodger and bimini with optional connector piece for full coverage, Good mainsail cover, B&G Triton Wind, Depth, Speed instruments (2020), Autohelm 4000ST with “Autobuddy” Receiver for wireless control,Standard Horizon GX2200 with ARM auxiliary mic in cockpit connected to wifi converter, GPS/AIS via wifi, Raymarine radar dish and display, New (2019) toilet, New (2019) settee and v berth cushions, New (2018) curtains, Propane range and stove with 2 tanks, new (2020) bilge pump, 6 foot hypalon Achilles, 3.5hp Tohatsu, Kayak/paddle board davits, All necessary Safety equipment , Danforth anchor, rode and chain in anchor locker, backup plow anchor.
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)
Shoal draft: 4.25’/1.3m.
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