Sailboat specifications
- Last update: 13rd March 2020
J/133's main features
- 2004: Cruising World - Boat of the Year: Performance Cruising Boat
J/133's main dimensions
J/133's rig and sails, j/133's performances, j/133's auxiliary engine, j/133's accommodations and layout.
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- Sailboat Guide
J/133 is a 43 ′ 0 ″ / 13.1 m monohull sailboat designed by Rod Johnstone and built by J Boats starting in 2006.
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)
Built in US and France. Shown here is US version.
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The J133 is a 43.0ft fractional sloop designed by Johnstone and built in fiberglass by J Boats since 2006.
The J133 is a light sailboat which is a very high performer. It is stable / stiff and has a good righting capability if capsized. It is best suited as a fast cruiser. The fuel capacity is originally very small. There is a very short water supply range.
J133 for sale elsewhere on the web:
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The ideal mid-40s length racer/cruiser…and a winner of The Sailing World Magazine Overall Boat of the Year, J/133 is a yacht with the stability for short-handed cruising, race winning speed under IRC & PHRF, durability for rough offshore passages. Add in the retractable carbon bowsprit and flying and handling the asymmetrical spinnaker ...
Sailboat specifications. Last update: 13rd March 2020. The J/133 is a 43’ (13.11m) cruiser-racer sailboat designed by Rod Johnstone (United States). She was built since 2004 (and now discontinued) by J/Boats (United States). She has been awarded " 2004 - Cruising World - Boat of the Year: Performance Cruising Boat ".
Auxiliary Power. Inboard 55 HP Saildrive diesel engine, 115 AH alternator, with double diode and fresh water-cooling with heat exchanger. Engine control panel recessed in cockpit, with plexiglass protection, including rev. counter, hour meter and alarms for oil pressure, low voltage and water temperature. 45 gallon fuel tank.
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. Formula. D/L = (D ÷ 2240) ÷ (0.01 x LWL)³ D: Displacement of the boat in pounds. LWL: Waterline length in feet
The J133 is a 43.0ft fractional sloop designed by Johnstone and built in fiberglass by J Boats since 2006. The J133 is a light sailboat which is a very high performer. It is stable / stiff and has a good righting capability if capsized. It is best suited as a fast cruiser. The fuel capacity is originally very small.