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NEW LISTING
2009 Precision 185 Swing Keel Custom Trailer Always Sailed in Fresh Water Stored Inside, Like New
Equipped With:
Hand laminated fiberglass construction Vinylester resin hull skin coat Positive Foam flotation 9 ft. 9 in. Self bailing cockpit 8’ 2’’ Long Ergonomically correct cockpit seats Stern swim platform/boarding area Large forepeak locker w/watertight door Ballasted fiberglass NACA foil centerboard Sealed centerboard trunk w/mainsheet block 4 Mooring cleats (Fixed keel version has 4 Stainless Steel Lifting eyes/mooring eyes) Kick-up rudder (Fixed keel version has fixed rudder blade) Tiller extension Harken ball bearing blocks Harken Jib track with cars and Harken cam cleats Harken 4 to 1 boom vang Anodized mast and boom Hinged Stainless Steel mast step Stainless steel standing rigging Dacron running rigging Stainless steel bow eye Harken Jib Furling Gear High Performance Mainsail and Furling Jib
Trailer Features:
Magic Tilt trailer 2009- weight 330 lbs. Galvanized Magic Tilt Trailer Raised mast support forward for safety Starboard plastic mast support for rudder gudgeons Over center cam strap to hold boat to trailer Winch on bow stand Low profile wide body tires Rotating Tongue jack forward
Design Comments:
These boats were designed for good all around performance Low weight, and low maintenance combined with great ergonomics & high performance Comfortable seating Computer shaped hull and fins with precise tooling Large self draining cockpit Secure spot for a portable ice chest Swim platform at the transom contributes to fun and safety She offers speed, stability and control Broad deck beam and high volume side decks will keep her crew dry
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)
Centerboard Model:
Draft
Board up: 0.5’
Board down: 4.83’
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