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I am selling my 1988 CS 30 which I purchased in Maine 11 years ago. I purchased the boat because she was the best 30 ft sailboat I could find and under my ownership she has been continuously upgraded. CS built some of the best quality production yachts. Just this year she has had a new bimini ($3K) and a new dripless PSS shaft seal ($1,2K). She has had light use as a cruising boat and over the last 3 years I have not burnt a tank of gas. The Volvo engine, Model 2002, runs perfectly. I will gladly provide a list of upgrades that have taken place including new standing rigging, new barrier coat and rewired mast. More pictures are available.
Equipment: Equipment Garmin 742 chart plotter with depth sounder Garmin HD radar 18 Autohelm ST Depth Sounder Autohelm ST speed / Log Hallett main and 135% Genoa Banks 135% Genoa Dodger, filler section and bimini Winter cover Avon dingy with 2 HP Yamaha outboard
Dimensions LOA 30 ft Beam 10 ft 3 in Draft 5 ft 6 in Displacement 8,000 lb
Engine Manufacturer Volvo Penta (Head and injectors rebuilt 2016), new exhaust elbow Model # 2002 Diesel HP 18 Max Prop 3 bladed folding propeller (just rebuilt)
Tanks Fresh Water 30 gallons Fuel 18 gallons Waste Holding 25 gallons
Accommodations Number of double berths 3 (sleeps 6) Number of cabins 2 Number of heads 1
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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