J/42

1999 — 2005
Designer
Rod Johnstone
Builder
J Boats
Associations
?
# Built
35
Hull Type
Fin w/bulb & spade rudder
Construction
FG

Dimensions

Length Overall
41 11 / 12.8 m
Waterline Length
35 1 / 10.7 m
Beam
12 2 / 3.7 m
Draft
6 7 / 2 m
Displacement
19,700 lbs / 8,936 kg
Ballast
7,000 lbs / 3,175 kg (Lead)
drawing

Rig and Sails

Type
Masthead Sloop
Reported Sail Area
790 ft2 / 73.4 m2
Total Sail Area
789.6 ft2 / 73.4 m2
Mainsail
Sail Area
418.5 ft2 / 38.9 m2
P
46 5 / 14.2 m
E
18 0 / 5.5 m
Mast Height
?
Foresail
Sail Area
371.1 ft2 / 34.5 m2
I
50 5 / 15.4 m
J
14 8 / 4.5 m
Forestay Length
52 7 / 16 m

Auxilary Power

Make
Yanmar
Model
3JH2-TE
HP
67
Fuel Type
Diesel
Fuel Capacity
31 gal / 117 l

Accomodations

Water Capacity
100 gal / 379 l
Holding Tank Capacity
?
Headroom
?

Calculations

Hull Speed
7.94 knots
Sail Area/Displacement
17.33
good performance
Ballast/Displacement
35.53
less stiff, less powerful
Displacement/Length
203.37
moderate
Comfort Ratio
29.06
coastal cruiser
Capsize Screening
1.81
better suited for ocean passages

Notes

Shoal draft version draws 5.5’.


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