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The Precision 15 is the smallest in the Precision Boat Works fleet, but she is by no means the least significant.
The Precision 15 has earned high praise from both owners and competitors for her lively and rewarding performance. And her affordable price and quality reputation have been achieved through simplicity of design and cost effective assembly, not compromises in her quality hardware and hand-laid solid fiberglass construction.
Designed to provide safety, stability, reliable handling, and sprightly speed under sail, she will shorthand beautifully under her large main alone; even better with her high aspect jib hoisted. And her centerboard with NACA foil sections gives her the utmost hydrodynamic efficiency upwind.
The Precision 15 features an unusually broad beam, substantial freeboard and high volume coamings to help prevent swamping or capsizing. She provides a large forward storage area and her cockpit is safe and comfortable for both adults and children, with footwells and seats unusually wide and deep.
With an unobtrusively low centerboard trunk and an elegantly simple swept spreader three-stay rig, the Precision 15 is beautiful both to see and to sail. And at only 390 pounds fully rigged, she’s a snap to trailer and launch.
You’ll enjoy many years of safe and spirited sailing in your Precision 15. It has been designed with great care and intelligence; constructed with professional integrity and quality craftsmanship and materials to provide you long and careful pleasure of ownership and outstanding resale value when you sell.
Equipment: Equipment
custom mooring cover Hand laminated fiberglass construction Vinylester resin hull skin coat Foam flotation 9 ft. 4 in self bailing cockpit Large forepeak locker w/watertight door Lead ballasted keel (15K) Ballasted fiberglass NACA foil centerboard (15 CB) Covered centerboard trunk 4 mooring cleats Kick-up rudder Tiller extender Harken ball bearing blocks Jib track with cars and harken cam cleats Harken boom vang Anodized mast and boom Hinged mast step Stainless steel standing rigging Dacron running rigging Stainless steel bow eye Main sail and jib
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)
Based on the earlier PRECISION 27.
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