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Project boat that never got started. My wife and I bought this boat about a year ago with the intention of living aboard and repairing. This plan has changed after a recent addition to our family. The boat has been in the water at an Annapolis marina for about eight years. This boat needs a complete refit, every system needs to be replaced or repaired, including the engine which needs to be replaced, but this boat is repairable. I just wanted to front load the harsh realities before waxing eloquent about this boats potential. When you step onto the boat you can immediately see its potential. This isn’t a boat built to be the fastest or sail closest to the wind, but to get you there in comfort and safety. Per the reviews Ive read about the Irwin’s, these boats are built solidly. It has a spacious cockpit, wide side decks and raised bulwarks. I’m 6 and never have to duck my head on this boat. The companionway door leads into the salon with the galley starboard and aft and a table with seating or sleeping area mirrors the galley. There are three cabins, a stateroom in the stern with attached head, port cabin with attached head, and v-berth cabin in the bow. The third head is on the starboard side opposite the port cabin. This boat just feels spacious when you’re on it, and has a ton of storage areas. It could easily serve as a live-aboard cruiser, and could definitely take you around the world once it has been refitted. Asking $15000 OBO
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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