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2007 Nacra F17, not the Olympic 17. Designed for single handed sailing, but has plenty of volume in the hulls and will easily take two people. A few dings on the hull. Two mainsails in very good condition. Three spinnakers, all in very good condition. The white spinnaker is a from the Olympic 17, has been used once, and costs approx $1500. Standing rigging was replaced two years ago. Single adjustable trapeze. Two harnesses. Toy box. Mast float. Mast raising gin pole. Righting pole under the trampoline. Cat tracks. Large black cover. Two sets of dagger boards. Two sets of rudders. Two booms. Lots of extras. Now for the bad. I hit a power line with the mast two years ago. I’m fine thank you. It touched at the aluminum pole supporting the masthead float. No damage to the mast and has been sailed pretty hard since then with no problems. I left it unpainted so any damage can be seen. The rudders and dagger boards have some wear and scratches. The mast step where the pin goes through cracked and I welded it back. Works fine. The bow sprit broke in half and has been sleeved and riveted. No problems. I’ve been sailing catamarans (mostly the Hobie 18) for 45 years and this is easily the best sailing boat I’ve ever been on. Only reason I’m selling is the setup time is a bit much so I moved to a VX EVO.
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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