Bolger Cynthia-J
Description
The Bolger Cynthia-J is a small, simple, trailerable sailboat design by Philip C. Bolger, intended as an easily built home project using plywood and straightforward construction methods. Typical of Bolger’s “instant boat” philosophy, it emphasizes practicality over elegance: flat panels, minimal complex curves, and a boxy but efficient hull form that keeps costs and build time low. Designed for protected waters and casual sailing rather than offshore work, it offers good initial stability, modest sail area, and uncomplicated rigging so that a single sailor or small crew can handle it easily. The Cynthia-J reflects Bolger’s broader design approach—prioritizing usability, shallow draft, and low maintenance—making it well suited to beginners, budget-conscious builders, or tinkerers who value function and ease of construction over traditional yacht aesthetics.
The standard boat dimensions
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Sails
Bolger Cynthia-J - MAINSAIL
| Luff | 6.08 ft - (1853 mm) |
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| Foot | 17 ft - (5182 mm) |
| Leech | * 17.37 ft - (5294 mm) |
| Tack Angle | * 87.96 ° |
| Diagonal | * 17.85 ft - (5441 mm) |
| Head (inches) | * 6 in - (152 mm) |
| Area | 51.32 ft² |
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Bolger Cynthia-J - GAFF MAIN
| Luff | 10 ft - (3048 mm) |
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| Foot | 15 ft - (4572 mm) |
| Leech | 19 ft - (5791 mm) |
| Tack Angle | 85 ° |
| Diag (clew/throat) | * 17.29 ft - (5270 mm) |
| Head | 9 ft - (2743 mm) |
| Area | * 152.38 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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