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J/124 built by J Boats and designed by R. Johnstone. Her first hull was built in 2002 with an overall lengh of 12.41 m or 40.70 ft long

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J/124 Sailboat Specifications​


Overall Length (LOA) m / ft12.41 m / 40.70 ft
Builder(s)J Boats Tillotson Pearson
Designer(s)R. Johnstone
BrandJ Boats
CountryUnited States
Hull TypeFin w/bulb & spade rudder
Number of Hulls Built35
First Hull Built2002
Last Hull Built2007
Ballast TypeLead
Rigging TypeFractional Sloop
Freshwater Tank Capacity lt/gal132 L / 35 gal
Ballast Ratio39.68


Overall Length (LOA) 12.41 m / 40.70 ft
Waterline Length (LWL)11.03 m / 36.20 ft
Beam (width)3.45 m / 11.33 ft
Draft2.10 m / 6.90 ft
Light Displacement (MLC) 5715 kg / 12600 lb
Maximum Displacement5715 kg / 12600 lb
Ballast Weight2268 kg / 5000 lb


Capsize Screening Formula (CSF)1.95
Comfort Ratio20.45
Displacement-Length Ratio (DLR)118.58
Ballast Ratio39.68
Sail Area to Displacement22.36

Above Deck

Estimated Forestay Length15.53 m / 50.96 ft
Reported Sail Area70.05 m² / 754.00 ft²
Total Sail Area70.09 m² / 754.40 ft²
Mainsail Area38.22 m² / 411.40 ft²
I49.00 ft * 14.94 m
J14.00 ft * 4.27 m
P48.40 ft * 14.75 m
E17.00 ft * 5.18 m
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