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I have a pristine 2004, Precision 21 sailboat, trailer and 5hp Yamaha 4 stroke motor (2011) that I would sell.
I have run into a health problem that has kept me from sailing this year. The boat has been sailed only in fresh water, dry docked and never slept in. All external trim is plastic with the exception of the grab handles on the cabin top which are still teak.
This boat is rigged to sail in any weather with performance, but pricey.
If interested call Barry at 319- 331- 1401, I need to get $16,000, but worth it. I bought the boat in 2007 and am the second owner. The boat has been in a building every winter plus last summer since I have owned. It was to be our last boat, thus the fancy sails and many extras. I can send more pictures if interested.
Equipment: I purchased a new Technora Main in 2008 and in 2009 I put new Harken roller furling and new Technora 155 genoa and 110 racing cut jib, Spinnaker and pole I also have the original main.
2021 new ULMAN Tri radial Armid main and 150 Jib. New Sheets and halyards in 2021-23 and new Spinlock cam cleats
Full boat cover mast up or down plus cockpit boom cover. Cockpit cushions.
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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