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Here is a tough old battleship Irwin, the original 43 aft cockpit sloop, handily and incrementally renovated by the current owner over the past decade.
A heavy build vessel with a very roomy cockpit and interior, the tall bow is flared to shed seas, and freeboard is ample, the ride will be comfortable in 6-7 foot seas, making this a capable blue water and long excursion cruiser.
Down below is a large main cabin with plenty of seating, galley with stove and a large, refrigerated ice box, head with shower, forward berth, and two aft quarter berths… room for plenty, a luxury for two.
The original Westerbeke 30 hp engine was replaced with a 60 hp Perkins, with the entire driveline upgraded to handle the increased power, and virtually all plumbing and wiring for both the machinery and domestic systems replaced as well.
The mast was refurbished and all the standing and running rigging replaced, and the entire cabin sole has been professionally replaced with beautiful, tough bamboo.
One owner preference alteration was to pin the centerboard at five feet of draft, a reversible modification, because the owner did not like the design of the lift mechanism, felt the boat performed fine without the deployed centerboard, and, as a long-distance cruiser, did not wish to risk being stuck with it down.
Fully equipped with ample and serviceable sail inventory, safety gear, and spares, this boat is ready to take you anywhere you wish to go.
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 fixed keel version was also available, as was a yawl rig. Diesel available as an option.
This listing is presented by PopYachts.com. Visit their website for more information or to contact the seller.
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