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one of Sparkman & Stevens best cruiser/racer designs. Hull #75,with Scheel keel. Fresh water boat until 2005. Then all new rigging , RF, many electrical (3 batt banks /isolator,150A alt/ electronic voltage regulator) & mechanical,( ex both oil pressure gage & light) updates,virtually everything replaced or renued. Nice teak interior, Extensive canvas, dodger with zip-on awning. Lewmar alloy 44 ST winches. Lots more. Custom “Top-Gun” winter cover. 10kg delta anchor/ss lead chain, 25 ‘chain 150’Sampson nylon braid: 15kg Bruce type storm anchor & rode neatly stows in lazarette. New cabin sole. In the water, moored in Wickford Harbor. Expect to haul mid September 2021.
Equipment: 120, 135,142 genoas for RF, newer mainsail, asymmetrical spin with ATN sock and tack.other older sails (10 total).Updated complete electronics inc 2 VHF, passive AIS,GPS & radar. Virtually all led lights including high usage items like Anchor Light, Deck Light,& Running light. 3 blade high efficiency Campbell Sailor prop(same sailing drag as 2 blade oem but much smoother and more powerful.Full electronics inc Radar, passive AIS Lots of hard to find spares.
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)
The TARTAN 33 R is the masthead rigged, more racing oriented, version of the TARTAN 33 and is relatively rare.
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