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A LUXURY SAILBOAT BUILT TO ROAM THE WORLDS OCEANS
Hull number 25 of the hugely successful range, Janus is a fine example of the Oyster 575 MKII styling above and below decks, including the triple seascape windows adding extra illumination to the saloon. Her modern interior feels light and spacious with American light oak joinery contrasted with walnut plank-effect flooring. Janus features a well-thought-out interior layout boasting eight berths in four ample cabins, a good-sized galley leading aft from the saloon, and two large heads for comfortable, easy cruising with family and friends.
Cutter-rigged with push button hydraulic furling to her mainsail, yankee and staysail make Janus simple to handle for a couple and she is an obvious choice for those seeking the ultimate shorthanded blue-water cruiser under 60 feet.
For more information contact Nicole Cook at Denison Yachting. 954-763-3971
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)
Draft (shoal) 2.06m/6.75’
Draft - Centreboard - Board Up (SuperShoal) 1.65m/5.42’
Draft - Centreboard - Board Down (SuperShoal) 3.82m/12.5’
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