Great choice! Your favorites are temporarily saved for this session. Sign in to save them permanently, access them on any device, and receive relevant alerts.
1998 Nacra Inter-20. FULLY RESTORED FRESHWATER BOAT!The original owner was based in Wisconsin who competed with it in the “Catamaran Racing Association of Wisconsin” or “CRAW”. It was then purchased by a gentleman in Washington State who had plans to dismantle it for some type of prototype project but never used it. There it sat for a few years and was never used. 3 years ago I purchased it from the gentleman in WA and had it brought down to Phoenix, Arizona. I sailed with it here at local lakes having only taken it to Rocky Point, Mexico once to prepare for some longer distance ocean races. Unfortunatley after only 10 minutes on the water we discovered that the rear beams had seperated from the hulls from the wave action. (This is a common manufacturing defect that has happened to every single I-20 I have ever seen). We immediately sailed the 10 minutes back to shore and washed the boat off in fresh water and headed back home. (20 mintues of saltwater exposure in its life!) Since then the boat has been completely disassembled and restored and is ready for the Worrell 1000 or head to the local lakes. Hulls have been repaired and reinforced to prevent beam seperation New new paint job & decals, buffed and waxed, including mast, all with PPG Aero paint. New foam decking. New traveler lines. New fully adjustable trapeze for both crew and helmsman. New Dakine footstraps. New EP spinnaker sock. New jib sheets. 3 Square-Top EP mainsails. GREAT SHAPE! 3 EP jibs. (1 non battened, 2 battened GREAT SHAPE) 3 spinnakers. (1 in very used but useable condition- black, 2 like new black & yellow) All Harken bocks and hardware. 6:1 main block. Carbon Fiber End Pole. Trampoline will last for years! Custom mast stand for set up and take down. Catrax beach wheels. Harken roller-furler forstay. Alumex, aluminum boat trailer. Fiberglass catbox minus hardlid & Toybox sailbox. (More than enough storage!)Im sure im forgetting some things. There is quite a bit. This boat is a headturner and in immaculate shape! There are not many other things that you could update on this boat. Like I said before, this boat is ready for serious racing or sailing. I have only had it in the water one time since its restoration and it performed flawlessly. She literally sings now. Will consider deliveries as far Northwest as Ventura, CA for the right price.
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)
Designed to International 18 rule
Mainsail: 183 sq.ft.
Jib area: 37 or 45 sq.ft.
Assym: 204 or 226 sq.ft.
Carbon daggers and rudders.
Twin trapeze.
Built at Performance Catamarans in California (USA) but first introduced in France.
Not the same as NACRA F18/FORMULA 18 (2003).
This listing is presented by TheBeachCats.com. Visit their website for more information or to contact the seller.
Great choice! Your favorites are temporarily saved for this session. Sign in to save them permanently, access them on any device, and receive relevant alerts.
©2024 Sea Time Tech, LLC
This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply.