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SOLD Beautifully presented, fast, fastidiously maintained, dagger-boarded sailing cat, ready to sail away ! If you are in the market for a well built and well optioned catamaran, and want to save money compared to a new build then you can’t go past this well presented Schionning Spirited 380 - “Siva” meaning Polynesian dance of love and growth. Launched in 2012 by the one owner, she boasts a superb two pac paint finish, which receives compliments wherever she goes. SIVA underwent a major refit in 2016, overseen by Craig Schionning. The 3 cabin, owners-version has a master queen berth and en-suite in the port hull and a queen guest berth with separate king single berth and bathroom in the starboard hull. A long list of well-designed features and options have been fitted allowing an open plan and easy movement throughout the vessel. “Siva” excels under sail and on the other hand offers all the comforts for remarkable liveability while at anchor. Her twin helm station location is easily recognizable with 2 carbon fibre helm wheels and easy access to the reversible Andersen winches, as well as, 360 degree visibility from any helm position. SIVA has been fitted with KE 4 electronic throttle controls, fixed on the starboard side, and remote on the port. The allows the helmsman to be on the bow controlling the throttles whilst picking up a mooring or dropping an anchor. An additional powered winch has been added to the fore deck area, all halyards and reef lines to be operated under power, a continuous furling line also allows for ease of furling sails under loaded conditions. She is powered by 2 x Yanmar 22hp sail drives, with 2 x Gori folding props. There is approximately 1000 hours on the engines. Her sail inventory is in very good condition which allows reported speeds of 24 knots, while comfortable cruising at 8-9 knots. “Siva” is priced well at below replacement cost and the owners are inviting offers.
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)
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