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This factory new Precision 21 is a very well designed and soundly built cruiser/racer built in Florida by a high quality builder. She is over-built by modern factory production standards and is both stable to sail and lively in a breeze. The shoal keel makes her easy to trailer and able to sneak into shallow anchorages, while the retractable centerboard gives her stability and low leeway.
The cabin has an open design without bulkheads and compression posts dividing the space. Two side berths plus a large v-berth can accommodate a small family or a couple spaciously. The alcohol stove, and galley sink make overnighting comfortable. Original boat documents included.
This boat is in excellent condition and has been stored inside since 2013. There is a tiny chip on the gel coat on port side of the cockpit. She is waiting to be commissioned, named, and launched for her first sail.
Equipment: Sails / Rigging Dacron Main & Furling Genoa Jiffy Reefing System with 1 Reef Point Schaefer flexible furler Mast crutch
Outboard Motor mount on stern Motor not included
Deck 7 1 Self Bailing Cockpit. Boarding ladder 1 anchor Stern Rail Seats
Trailer Magic Tilt Trailer Performance make Galvanized One axle Excellent tires
Interior Undivided space Large v-berth Side berths Alcohol stove Galley sink with water tank & overboard drain Storage shelves
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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