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- Sailboat Guide
J/92 is a 29 ′ 11 ″ / 9.1 m monohull sailboat designed by Rod Johnstone and built by J Boats between 1992 and 2003.
Rig and Sails
Auxilary power, accomodations, calculations.
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
Max Speed/Length ratio = 8.26 ÷ Displacement/Length ratio .311 Hull Speed = Max Speed/Length ratio x √LWL
Sail Area / Displacement Ratio
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
- SA : Sail area in square feet, derived by adding the mainsail area to 100% of the foretriangle area (the lateral area above the deck between the mast and the forestay).
- D : Displacement in pounds.
Ballast / Displacement Ratio
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
Displacement / Length Ratio
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
- D: Displacement of the boat in pounds.
- LWL: Waterline length in feet
Comfort Ratio
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 Beam 1.33 )
- D: Displacement of the boat in pounds
- LOA: Length overall in feet
- Beam: Width of boat at the widest point in feet
Capsize Screening Formula
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)
A updated version, the J/92S was introduced in 2005 with a newly designed cockpit, deck, keel, rudder, sail plan with non-overlapping headsails and masthead asymmetrical spinnaker.
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Sailboat specifications
- Last update: 13rd March 2020
J/92s's main features
J/92s's main dimensions, j/92s's rig and sails, j/92s's performances, j/92s's auxiliary engine, j/92s's accommodations and layout.
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COMMENTS
Rig and Sail Particulars. A updated version, the J/92S was introduced in 2005 with a newly designed cockpit, deck, keel, rudder, sail plan with non-overlapping headsails and masthead asymmetrical spinnaker.
J/92 Technical specifications & dimensions- including layouts, sailplan and hull profile.
The J/92 was designed by Rod Johnstone. It was introduced in 1992 by J/Boats who built 150 boats until 2003. [3] The displacement–length ratio is 132 [4] making it a light displacement boat. Beam is moderate at 10 feet (3.0 m) and the draft is 5.9 feet (1.8 m).
J/92 combines the best of both worlds without the drawbacks of either, while still retaining essential overnight capability and privacy below; the comfortable, large cockpit and simplified sailing systems of a cruiser with the response and acceleration of a finely tuned racer.
J/92 is a 29′ 11″ / 9.1 m monohull sailboat designed by Rod Johnstone and built by J Boats between 1992 and 2003.
The J/92s is a 29’11” (9.12m) cruiser-racer sailboat designed by Rod Johnstone (United States). She was built since 2005 (and now discontinued) by J/Boats (United States).
J/92. Ever since Rod Johnstone built Ragtime, which ended up being the J/24 prototype in 1974, J Boats has produced boats that are fun to race as well as comfortable and manageable enough for family cruising. The new 30-foot J/92s fits that design brief perfectly.
J/92s Technical specifications & dimensions- including layouts, sailplan and hull profile.
The J Boat people have always looked for a different approach in an effort to stay one step ahead. The thrust of their search appears to be more speed for less effort and, of course, that translates into more efficient designs. The new J/92 follows the concept made successful by the J/105.
Sailboat Specifications. Definitions. Hull Type: Fin w/bulb & spade rudder. Rigging Type: Fractional Sloop. LOA: 30.00 ft / 9.14 m. LWL: