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1985 Herreshoff H-31
A true classic, ready to go! H-31 cat ketch. fast and easy the Herreshoff way. The boat has a draft of 4’ so she can sail anywhere. Simplified sailing, all self-tending sails.
The boat is powered by an Italian Nanni Industries 15 HP engine. The fuel tank holds 18 gallons. The batteries were recently replaced and the boat has two 100w solar panels.
The cockpit is roomy with wheel steering and the cockpit table folds neatly out of the way when not in use.
Down below is an open space, it lacks a forward bulkhead between the main cabin and the forward cabin. With sleeping accommodations for four crew, there is a forward V-berth in the bow and two double bunks in the main cabin, with a removable table in-between them. The berths all have storage underneath them.
The galley has an open layout and the head is to port at the foot of the companionway stairs. The engine is accessible by two removable doors.
This unstayed rigging features a simple layout. The halyards have been replaced in recent years. Tacking does not have to involve sail handling, as the sails are self-tending.
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)
Mainsail 242 sq.ft./22.48m2
Mizzen sail 151 sq.ft./14.03m2
Staysail 248 sq.ft./23.04m2
This listing is presented by PopYachts.com. Visit their website for more information or to contact the seller.
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