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1979 Nacra 5.2 catamaran for sale. Ready to race or day cruise and still has many years ahead. Comes with everything you need to get out on the water: crisp round top main sail with jib and an extra well-loved main sail for practice or day cruising, trap wires and lines, hiking tiller, 7:1 main sheet, and a barber hauler system to help adjust jib trim. In the past two years, the bottom of the hulls were redone and bulkheads reinforced, new deck grip was added, all hardware replaced, new downhaul line, new skipper trap kits, and the jib zipper was replaced. Comes with a rust-free light weight aluminum trailer, sail box and sail tube, and a set of cat trax with fiberglass cradles. One of the Cat Trax wheels needs to be repaired or replaced but are otherwise in good condition.Call Kate for more 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)
Besides the NACRA 36, of which few were built, this was the first boat called NACRA and enormously successful.
The designer was the first builder and was also responsible for creating the organization which he called the North American Catamaran Racing Association.
Replaced with the NACRA 5.5.
Thanks to Bob Hoffman for providing additional information.
This listing is presented by TheBeachCats.com. Visit their website for more information or to contact the seller.
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