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Chrysler C-20, 1979 $1.850 with motor, and trailer. Located on Kentucky Lake, Murray Kentucky
C-20 is a Herreshoff designed boat with a large, 10 foot cockpit, but claustrophobic cabin. Great for a day sail with friends, lots of freeboard, and very stable.
The boat draws 2 feet with the swing keel up, 5.5 feet with the 400 pound keel lowered. The mast is a robust 26 feet, mounted midships, not on the cabin deck, forestay, backstay and three shrouds per side. Robust indeed. There are 4 sails: the original main and “jib” ,which is actually a 110 Genoa, a small jib for single handing, and a 150 Genoa. There are Lewmar winches. The price includes the Shoreliner trailer and a nifty Lehr 5HP propane motor.
This boat is 40 years old.
The rudder trunk was rebuilt some time in the past and does not leak. The original sails were reconditioned sometime in the past but are serviceable. The winch for the keel is free and works well. The hull is stained from lake water. or phone 270 227 5130
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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