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Wind Rose is a very nice example of the Columbia 31 sailing vessel produced by Columbia Yachts. She was surveyed in December 2015 and found to be in good condition inside and out. Wind Rose has had many upgrades, including a major rebuild - with the installation of a new Yanmar 2GM20F engine and other equipment - in the early 2000s. Many recent upgrades have been added, including new standing and running rigging, lighting, roller-furling genoa and more.
Equipment: Standing & running rigging 2017 Harken roller-furling headsail system 2017 Compass and Raymarine depth and speed instrument 2017 LED mast wiring and lighting (anchor/tri-color, steaming/foredeck light), VHF antenna and wind indicator 2017 Rebuilt head and new 5-gallon holding tank installed 2017 Mid-ship cleats added 2018 Upgraded traveller installed 2018 12V monitor 2018 New batteries (2 dual purpose) 2020 ProSport HD12 Battery Charger 2020 Bilge pump and control 2020
Main & Genoa Whisker Pole Dodger Mainsail cover Removable cockpit awning Handrail and dorade box covers Ice box V-berth, cabin and quarter-berth cushions 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)
Derived from the Morgan designed ‘TIGER CUB’(1963?).
TALL MAST:
I: 37.5’
J: 11.33’
P: 33.0’
E: 14.5’
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