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- Sailboat Guide
J/24 is a 24 ′ 0 ″ / 7.3 m monohull sailboat designed by Rod Johnstone and built by J Boats, Sydney Yachts/Bashford Int., Ovington Boats Ltd., and Waterline Systems, LLC starting in 1977.
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)
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J/24 USA 2350 Sailboat Photo Gallery. Click here to view full gallery. Subscribe. Detailed photos of J/24 sailboats including running rigging, standing rigging, and deck layout.
For dinghy sailors of all ages, the J/24 is the most satisfying way to bridge the gap between the responsiveness of small-boat sailing and the rewards of big-boat racing. Strictly enforced one-design rules mean that the best sailor - not the sailor with the biggest budget - wins.
This J/24 photo gallery shows boat equipment from many angles. See pictures of things like the deck, hull, spars, hardware, gear, lines, rigging, mast, boom, control systems and more.
J/24 Class Documents; News. All News; Regatta Results; Newsletter & Archives; Events; Rules & Regulations. Class Rules Documents; Regatta Regulations & Regatta Support; Measurement Forms & Change of Ownership; J24 Used Boats & Classifieds; Useful Links; About The J/24. History; Hall of Fame; Used Boat Buyer’s Guide; J/24 Tips; Member Nations ...
Sailing 110+ Nations- World's Largest One-Design Class. J/24 has over 5,600+ boats sailing with over 50,000 people per year sailing them in every imaginable body of water on Earth in over 110 countries. J/24s can be sailed across a spectrum of sailing conditions with many levels of sailors- from beginners to experts.
International J/24 One-Design Class. There are currently 5,500 J/24s sailing in 150 fleets in 40+ countries, with large J/24 fleets existing in North America, Europe, Australia, and South America. The J/24 Class and its builders have provided J/24s for women’s and men’s regattas for over 35 years.
J/24 is a 24′ 0″ / 7.3 m monohull sailboat designed by Rod Johnstone and built by Sydney Yachts/Bashford Int., J Boats, Ovington Boats Ltd., and Waterline Systems, LLC starting in 1977. Great choice!
J/24: Boat; Crew: 3 – 5: Draft: 1.22 m (4 ft 0 in) Hull; Type: Monohull: Construction: GRP: Hull weight: 1,406 kg (3,100 lb) LOA: 7.32 m (24.0 ft) LWL: 6.10 m (20.0 ft) Beam: 2.71 m (8 ft 11 in) Hull appendages; Keel/board type: Fixed: Rig; Rig type: Fractional rig: Sails; Mainsail area: 12.68 m 2 (136.5 sq ft) Jib/genoa area: 11.58 m 2 (124. ...