©2024 Sea Time Tech, LLC
This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply.
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.
J Boats J40 Cruiser Hull No. 40 from 1987 for sale Very nicely maintained boat which has undergone 2 refits in 2005 and 2015. Ready for bluewater cruising for a couple or even single handed. Registered and flagged in Gibraltar. All necessary gear onboard: - Hydraulic Autopilot - Windpilot - GPS/ Radar/ AIS T&R/ Sailing Instruments/ Weather Fax/ Ebirp/ VHF and SSB Radio - Windgenerator 500W - Solar Panels 360 W - Water Maker, 12V, 20l/h, Little Wonder VIP - Mainsail (Dacron) with 3 Reefpoints and 4 Battens from 2015, very good - 130% Genoa (Hydranet) from 2017, as new - 100% Working Genoa from 2004, useable - 118 sqm Code 0, from 2017, never used - Set of storm sails, very good - Spinnaker Pole and Gear - Standing and Running Rigging new in 2005 - Extensive set of sunbrella covers for the tropics - Bimini and Dodger from 2017 - Yanmar 3JH3E from installed in 2005 with 2000 hours - too much to list….. Full list of equipment and specs available on request Will sell because we want to buy a Catamaran for a big Circumnavigation
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)
This listing is presented by SailboatListings.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.