youtu.be/ySVGIiVG2sA Promo video link. Sea Joy is a well-equipped performance cruising catamaran ready to take her new owners to desired destinations in speed and comfort. (Surveyed 2021) This is an opportunity to own a true “sailor’s” cat for a fraction of the cost of an H&H or Gunboat. The F-41 is a performance cruising catamaran by design legend, Ian Farrier. She is a roomy cruiser, with outstanding speed and handling without sacrificing interior space, seaworthiness, or structural integrity. The high performance of the F-41 is achieved through the lightweight hull construction techniques and highly efficient rig; areas where Ian Farrier was able to draw on his vast experience of developing innovative multihulls. The F-41 is essentially a cruiser and will appeal especially to those with experience of Farrier designs who now want to move up to a larger craft with more accommodation for live-aboard and fast passage-making capabilities. The hulls have a waterline length-to-beam ratio of 11:1, optimizing low wave resistance and internal accommodations. The bridge-deck clearance is high, increasing towards the stern to reduce pounding and drag on large waves. The interior of the F - 41 is bright and airy with excellent views all around. All cabins have good ventilation. Sea Joy was built over four years by her first owner and although listed as a 2007, she was only launched in 2011. The vessel is built of foam cored FRP with all equipment bought NEW. Auxiliary power is provided by twin NANNI 29 hp. diesels with new Twin Disc SP60 saildrives. She has been regularly upgraded with Raymarine i60 instrument package and new Garmin 12” MFD’s for both helm stations. Sail handling equipment and upgrades include a newly installed Lewmar electric 2-speed at the helm station, Harken 40ST primaries, Mackpack stack pack with lazy jacks, Harken jib furler, and full-length, stern mounted Harken main traveler.
Equipment: Please contact Bryan Allen for full equipment lists. firstname.lastname@example.org Sea Joy is well equipped and ready to go cruising. Current owner has invested over 100k in a 2021-2022 refit to prepare her for extensive cruising. Plans have changed for the owner and Sea Joy now represents one of the best opportunities on the market.
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 √LWLA 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)
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