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We are selling our blue water cruiser Free. Its a Contest 36, a very strong Dutch build yacht. She is located in Sint Maarten and setup for long distance cruising. She has been our home for the last 6 years, but the children are getting bigger and want their own room, so where are going to look for a bigger boat. Contest is a well-known yacht manufacture in the Netherlands, they are known for their high quality and strong yachts. This contest is designed by Dick Zaal and build in 1978, details off the boat can be found at https://www.dickzaalyachtdesign.nl/…/contest_36_sloop.html The engine is a Volvo Penta md17c partially revised in 2019 Free has 710 WP solar power and a 2000W pure sine inverter, which is enough to run the whole boat. But if its rainy for days there is also a Honda 2200i generator to fix that problem. Here is a list of some off the things we have replace in the last couple of years: New Sails and lazy bag end 2021 New Sprayhood end 2021 New watermaker (sea water pro) end 2021 New inter stays February 2022 New jabsco toilet March 2022 New solar panels New outboard engine for the Dinghy (Yamaha endurance 15HP) 2021 Dinghy Highfield Ul310 Hypalon (2019) VHF B&G V50 with wireless handset H50 (2019) Sailor RT144 with own antenna Icom handheld (2018) Furuno NX-300 Navtex (2019) Icom 801E SSB with pactor 3 modem 2x whale titan bilge pomp 150 liter per min. 2x electric bilge pump. Raymarine axiom plotter 7inch (2018) Raymarine wind, depth and log. Raymarine quantum rader (2019) Whisper power Inverter (220 50hz) 2000 Watt (2019) Whisper power battery charger 40A (2019) Control panels replace for new Philippi panels (2018) Lewmar anchor winch 1500W (2018) 80 Meter G70 anchor chain (2018) Rocna 20KG (2018) 6 person life raft (2019) Sea-save AIS Transponder (2018) scanmar monitor windvane DANBUOY with bag (2018) epirb ocean signal e100g (2018)
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)
Available as sloop or ketch.
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