J/29 Masthead

Description

The J/29 Masthead Rig (1983–1987) is the cruiser-racer counterpart to the more famous fractional-rig J/29, built on the exact same hull and keel but with a shorter, non-overlapping masthead rig intended for easier short-handed sailing and slightly gentler manners. It carries ~490 sq ft upwind (smaller full-roach main + 100–105 % blade jib on a conventional single-spreader masthead spar), dropping the SA/D to a still-lively ~24–25 while keeping the same 7,500 lb displacement and 6′2″ deep fin (or 5′ shoal). The lower rig reduces mast bend and mainsail complexity, making it more forgiving in a blow and simpler to tune, yet it still planes off the wind in the mid-teens under symmetric or asymmetric kites and remains very competitive in PHRF (typically 114–126). Below decks it’s identical to the fractional version—functional V-berth, two long settees, enclosed head, small galley—perfect for a couple or young family doing weekends or the occasional distance race. Only about 110–120 masthead-rig boats were built (roughly one-third of total J/29 production), and they are now the most affordable way into a proper offshore-capable, trailerable J/Boats experience.

Construction Details

Designer Rod Johnstone
Builder J Boats
Length 29.500 ft
LOA 35.950 ft
LWL 30.500 ft
Beam 11.760 ft
Max Draft 6.600 ft
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The standard boat dimensions

i 40 ft
j 12 ft
p 35 ft
e 12 ft
p2 -
e2 -
i2 -
j2 -

Sails

J/29 Masthead - MAINSAIL

Luff * 35 ft - (10668 mm)
Foot * 12 ft - (3658 mm)
Leech * 36.36 ft - (11083 mm)
Tack Angle * 88 °
Diagonal * 36.6 ft - (11156 mm)
Head (inches) * 5.25 in - (133 mm)
Area * 216.54 ft²
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J/29 Masthead - JIBSAIL

Luff * 33.41 ft - (10183 mm)
Foot * 15.73 ft - (4795 mm)
Leech * 29.31 ft - (8934 mm)
Percentage LP * 115 %
Length Perpendicular * 13.8 ft - (4206 mm)
Deck Angle * 11.99 °
Area * 230.51 ft²
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J/29 Masthead - GENOA

Luff 39 ft - (11887 mm)
Foot 17.25 ft - (5258 mm)
Leech 36.75 ft - (11201 mm)
Percentage LP * 134.75 %
Length Perpendicular * 16.17 ft - (4929 mm)
Deck Angle * 3.66 °
Area * 315.37 ft²
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J/29 Masthead - GENOA

Luff 40 ft - (12192 mm)
Foot 19.67 ft - (5995 mm)
Leech 38.25 ft - (11659 mm)
Percentage LP * 154.58 %
Length Perpendicular * 18.55 ft - (5654 mm)
Deck Angle * 2.75 °
Area * 370.96 ft²
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J/29 Masthead - SPINNAKER

Stays * 39.67 ft - (12091 mm)
MidGirth * 21.6 ft - (6584 mm)
Foot * 21.6 ft - (6584 mm)
Perc LP * 180 %
Area * 728 ft²
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Disclaimer. Boats are not all the same -- even when produced in the same factory of the same model. Sailrite does its best to publish accurate dimensions, but we often find it worthwhile to have our customers measure their boats carefully before we produce kits for them. You should take the same precautions, especially when the data is not from Sailrite. The information on this site is not guaranteed to be accurate. Sailrite offers this content as a service to our community, but takes no responsibility for the reliability of the data provided.

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