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Incredible Upgraded customized 1980 NACRA 18 Square Meter Catamaran TRRE0089M80J and Custom Hydraulic special designed Tilting Trailer wherein the boat is automatically centered over the trailer while in the up and the down flat position, all done by hydraulic lift ram and swing arm.
I was a Sol Cat, Prindle then NACRA dealer in the Seattle, WA area for Decades, this is my own 18 Square Meter Catamaran. The boat is in perfect shape no scratches or scuff on the hulls. Combined this 18 Square and trailer may be without a doubt the best in the country. Boat has always been stored inside a climate-controlled building and I have not used the boat for the last 20 years. The 18 Square boat was mine from new and price with Trailer, two Sails and two booms all custom and modified with spare parts, the asking price is $15,000 or Best offer
Sailing an 18 Square meter is a delight and once you learn the boat and the sail settings the boat really flies. This boat has won numerous regattas
For further information more pictures, or discussions please sent e-mail to get2btdinc@gmail.com or btdinc@earthlink.net and include your contact information.
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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