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I’m moving to a larger CS and am selling my beloved 1988 CS 30. I purchased out of Bronte in 2014. It was the cleanest CS for sale that year. It remains that and more. It is lying on the South shore of Lake Ontario-I’ll split the trucking charges if going back ‘home’ to CA. The hull, interior and engine shine. Bilges waxed-you get the idea. Newer cruising laminate 155 Genoa-Haarstick. Upgrades too numerous to list. Never failed to start, never failed to deliver fast, fun cruising. More pics on demand. $25k USD
Equipment: New Icom GPS radio, Newer Haarstick sail, folding cradle, custom winter cover and frame, new glass on dodger, LED lights, CD player, Raymarine Tridata, TV, New battery, New inverter, much more.
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)
This was the most popular model built by CS yachts with more than 90 built in the first year alone.
Shoal draft version: 4.25’/1.3m.
Shoal draft (wing keel with spade rudder); 4.5’/1.37m.
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