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This is the H18 for you! A 1983 with Blue Hawaii sails, blue hulls, and a blue tramp. I have been the caretaker of this catamaran for 20 years. Just 2 owners. It has been covered the entire time except when on the lake. My wife says 68 is too old to sail a cat (for her, haha) lost my crew. This boat is a survivor and is in great shape. Spent over $1k last year to replace all of the standing and running rigging. The original tramp was replaced with a mesh tramp and is is great shape. New tires and bearings on the trailer. Mounted on the trailer is a cat box that holds the sails, rudders, daggerboards, trap harnesses, tiller extension, etc.The Hobie 18 has a 28’ - 1” mast with 240 sq ft of sail. It has a fully battened main sail with a full length boom. The jib isn’t battened. It has a draft of 2.5 ft with the daggerboards extended. It weighs 450 lb. It has adjustable mast spreaders and dual trapeze wires. The wires were replaced last year.To help you have the fastest H18 on the water, included in the sale are the “Hobie 18 Assembly Manual” and “The Hobie 18 Performance Manual” by Phil Bergman. The hulls are in great shape with NO soft spots. Looks great on the water. It is tough to let her go.You can’t ship a catamaran. The boat is in Arizona, maybe we can arrange to meet somewhere?
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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