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This is a 1990 Carlson 32 Catamaran Ultimate Concept. It is powered by twin 20 HP Tohatsu 4-stroke outboards (one in each hull).
The boat is based on an Iroquois model. Carlson bought the molds, did some changes and called it the Carlson Ultimate Concept 32. Only about 6 were made.
Gear on board is a Harken roller furling headsail, a recently added fully battened mainsail new in 2020 with stackpack, lazy jacks, spinnaker, dual swing keels,(which need to be removed and rebuilt), 2 sheet winches, Harken traveler, boom vang, and retracting rudders.
Electronics are a VHF, GPS, depth finder, and autopilot. In the cabin is a propane 2-burner oven /stove and a pressure water system.
The boat is outfitted with a shore power cable, solar panel, wheel hydraulic steering, an updated battery charger, and three batteries.
No built-in fuel tank. Portable tanks are in the engine compartments, 6 gallons and 3 gallons each. Engine hours are unknown.
Extras include 2 anchors, chain, anchor line, halyard winch, and bimini.
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)
A modified version of the IROQUOIS 30 built from the same molds, purchased from Sailcraft Ltd. (UK).
This listing is presented by PopYachts.com. Visit their website for more information or to contact the seller.
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