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I am selling my J120. I have owned her for 7 years, we had many years of local and long distance sailing. I’m looking to build a house and that is the reason that the boat is for sale. It has well maintained and upgraded. Upgrades include navigation station for offshore sailing that includes a pc with Expedition software with second garmin gps antenna for redundancy as well as an ipad holder for secondary navigation and app access. Electrical system includes Victron Multi-Plust12/1200 Charger/Inverter with ATS to switch between shore power and onboard Whisper 3.5 generator. System monitoring from Victron cerbo GX integrated with smart shunt 500A, Battery Protect. Upgraded electrical system with Blue Sea 8804 Electrical Panel, ML-RBS and ML-ACR switches and combiners and Blue Sea 285 breakers. Instruments have all been upgraded to Garmin 8612xsv, (4) GNX120 mast displays, Actisense USB to N2k. AIS 600, GMR18HD Radar, Garmin Fusion RA70N radio, backup GPS19x, GMI20 Autopilot with B&G RAM-T2-12v. Icom M506-21 VHF with Command Mic at Helm Alder Barbour Cold Machine cu-100 cold plat in cooler. Force 10 propane stove with (2) tanks Harken MK1V furler. Harken hydraulic backstay. Main and Jib sail covers. Dual Bilge pumps, both automatic. And primary setup for alerts through cerbo gx. Head was upgraded to electric Raritan elegance push button with both fresh and raw water options and macerator. MOM overboard system.
Equipment: 2019 North 3DI Raw 760 Main Sail 2020 North 3DI Raw 760 Number 1 2019 North 3DI Raw 760 Number 2 2013 Quantum Number 3 2013 Quantum Number 4 2013 Quantum Jib Topper 2013 Quantum A2 200? Ullman A3 2013 Quantum A4 2013 Quantum A5 2013 Storm Main 2013 Storm Jib Engine Engine Make Single Diesel Engine Model Yanmar 3-Cyl 3JH3E 40hp Fuel Type Diesel Fuel Filter Racor R20T Dimensions Length Overall 40ft Max Draft 7ft Beam 12ft Tanks Fresh Water Tank 75 Gal Fuel Tank: 27 Gal Holding Tank: 1 Rigging & Deck Gear Hall Spars Carbon Fiber mast repainted 2014 Stainless steel rod rigging 2 #48 self-tailing Harken primary cockpit sheet winches 2 #44 self-tailing Harken secondary cockpit sheet winches 2 #44 self-tailing Harken cabin top winches Hall solid boom vang Mainsheet winward sheeting traveller system by Harken Complete assymetrical spinnaker gear Toe rail mounted genoa track
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)
Some were finished in France.
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